Masson's Pine Bonsai: Production Methods and Key Cultivation and Care Points

The mountain pine grows fast, lives long, stays evergreen through all four seasons, is ancient and majestic, with a character both upright and unyielding, as well as tall, graceful and elegant. In the 1950s, Tao Zhu's book "The Style of the Pine" greatly praised this, and it circulated widely. The style of the pine undoubtedly has a strong appeal for bonsai enthusiasts.

Masson's pine (Pinus massoniana) is a type of mountain pine, widely growing in the hilly and mountainous areas below 1,800 m across the Jiangnan region, and is also commonly seen in southern Shandong, Henan, Hubei and the southwestern provinces. The Masson's pine trunk is rugged and gnarled, with thick rough bark, cracked into dark brown turtle-shell-like plates; the tree stands upright, reaching over 30 m in height, with branches in whorls and evergreen needles, two needles per bundle, occasionally three per bundle, the needles 15—25 cm long. Masson's pine is highly adaptable, wind-resistant and cold-tolerant, heat-tolerant, tolerant of poor soil, and not demanding about soil; slightly acidic red soil or weathered granite soil suits it best. Masson's pine wood is flexible, full of sap, with crisscrossing water-conducting lines, extremely plastic, easy to shape; branches can be bent, twisted and set quickly, and after shaping the needles are a striking green, giving a long viewing period, making it a superior material for making bonsai. However, because its main root is thick and long with few lateral roots, transplanting demands high skill, which affects the survival rate; added to this, the needles are rather long and in natural growth mostly soft and drooping, appearing loose and scattered, so previously it seems to have been cultivated less. The author has a special fondness for Masson's pine, has explored its cultivation for many years, and now offers some experiences for enthusiasts to consider.

I. Selecting the Raw Material

Although Masson's pine bonsai material can be grown from seedlings, without ten or twenty years the trunk will not develop

rough bark, and making a fine bonsai takes a very long time. Where conditions permit, the main approach is to dig up old stumps from the wild. Those old stumps that have been cut repeatedly by woodcutters, or battered by harsh environments, with short sturdy ancient-looking trunks, twisted and changing, with gnarled interlacing roots and clustered branches, unusable as timber, are precisely good raw material for making bonsai. Emphasis should be placed on choosing those that are dwarfed, aged, and can be developed into a naturally tapered trunk rich in variation, preferably with ready-made "dowry" branch pads, or with branch positions reasonably placed, buds fairly compact, room for selection, and prospects for development. Next, choose stumps with a relatively harmonious root spread, more lateral roots, spreading fairly flat, and easier to keep alive. Digging stumps in the wild must minimize the impact on the environment as much as possible, and adopt measures such as replanting seedlings; indiscriminate digging in a "burn all, cut all, dig all" manner is opposed.

II. Digging

Although the digging time for Masson's pine varies with the region, the difference is not great; generally it is best from October to November on the Gregorian calendar, when it begins dormancy, and from late February to March, when its leaf buds begin to sprout. Be sure to avoid the plum rain season, because Masson's pine likes dryness and fears dampness; digging on rainy days makes the soil ball hard to form, and the soil being too wet leaves the roots with poor aeration, which is unfavorable for rooting and survival.

Several aspects require attention when digging Masson's pine. First, prune the branches and leaves moderately. Before digging, generally the branches and leaves are pruned back fairly heavily, but this must match and balance the tree's vigor and the size of the soil ball and fibrous roots; leaving too many branches and leaves will cause dehydration and withering due to insufficient water supply from the roots, while leaving too few will cause root suffocation and rot due to lack of photosynthesis. At the same time, consider the intended shape: branches needed for the design or to be thickened should be cut as little as possible or not at all, and some dead branches should not be cut away lightly. The saw cuts on large branch pads should not be too flat, looking like aluminum plate; leave more room for later working, so the tree form appears more natural and aged. Second, when digging, apart from the main root that must be shortened if too long, retain as many lateral roots as possible, especially the "food-seeking roots" the size of chopstick tips; these lateral roots readily burst out new roots and promote survival. All cut root ends must be trimmed smooth, and rotted roots should be cleaned away thoroughly. Third, when lifting the tree, be sure to keep a good soil ball; the size of the soil ball depends on the size of the stump, the distribution of fibrous roots and transport conditions. Unless an individual stump has no main root or the soil makes the ball hard to form, keep it as large as conditions allow, first ensuring survival, and trim it before potting. After the soil ball is lifted, bind it firmly crosswise and lengthwise with tape or straw rope to keep it from breaking apart during transport and handling; whether the soil ball holds together is a key factor for survival. Fourth, after lifting the stump, shade it appropriately and spray water on the branches and leaves, reduce the resting time, and transport it back for planting as soon as possible. Some very good stumps, because they were left too long after digging and weakened by water loss, have their survival affected; this is truly a pity.

III. Growing the Stump

After the Masson's pine stump is transported back, if conditions permit, plant it in the ground for more than a year; where ground planting is not possible, use a wooden box or a large ceramic tray to grow the stump. The soil used can be a mix of river sand, coal ash and yellow loam, which is loose, drains water and yet retains moisture; other loose, plain soil can also be used, but sticky or alkaline soil is taboo. The straw rope binding the soil ball should be removed to prevent fermentation from burning the roots. After banking up the soil, tamp it firm all around with a bamboo stick, then water thoroughly, making sure the soil is soaked through and pressed close against the roots. Afterwards, for one week, only spray water on the branches and leaves, no need to water, and no need for shade, unless the temperature exceeds 30°C; still less should it be covered with plastic film. It is enough to keep the soil at a certain moisture level (on the dry side). If the soil is too wet, or even waterlogged, the survival rate will be very low. If the air humidity is too high and the soil too damp, add dry soil on the surface to absorb water; in rainy weather cover the soil ball with plastic film to keep out water. If the whole process is handled well, the survival rate can generally reach over 70%.

Good raw material is hard to come by, and survival is not easy, so growing the stump must be patient and meticulous, with careful observation, and impatience and haste must be avoided. Judging whether a stump has survived cannot rely only on whether new needles have sprouted, because the first bud break and needle flush is often grown from the nutrients and vitality stored within the stump; at this time new roots may not yet have grown, or the new roots are very tender and small and not yet able to absorb enough nutrients for the stump's needs, so careful care is still required until the buds extend to the second flush. Generally, a stump dug at the end of the year can only have its life or death confirmed after July of the following year. If the buds become soft and the leaf color turns dull gray, it is certainly doomed.

A Masson's pine stump must be grown for at least one year. During this period, apart from when buds genuinely need to be forced, do not casually cut away branches and leaves or remove buds, and even less should you dig into the soil to check root growth or rashly apply fertilizer. The main branch pads should be allowed to grow wild, building up the tree's vigor and loosening the bark. Once the tree is vigorous, it can be potted or shaped in place.

IV. Shaping

In principle, the shaping of Masson's pine bonsai takes vigorous, masculine strength as its theme, but because its branches are flexible and extremely plastic, while the stumps obtained from the wild are mostly short, sturdy and crooked, with clean, neat roots being rare and most lacking branch pads, one should not stick to one pattern but work according to the material, relying on the author's artistic sensibility and understanding of natural beauty, following aesthetic principles, capturing the most prominent features and the most beautiful aspects of the stump, expressing them fully, and turning the obtained material into a living work of art. Masson's pine bonsai takes a long time to complete; without ten or eight years, or even longer, of continuous creation, it is very hard to finish a satisfactory fine piece.

The first step in shaping a tree-stump bonsai is choosing the best viewing face. For an old stump dug from the wild, from the very start one should consider which face and which form can create the best viewing effect, but because time is short before growing the stump, only preliminary ideas and pruning are possible. During the growing period, one can continuously and carefully observe the trends and changes of the trunk, the thickness and distribution of the root spread, and the emergence positions and directions of the dowry branch pads, repeatedly weighing them, and considering them as an integrated, coordinated whole. Because authors differ in their worldview, outlook on life, artistic sensibility, understanding of natural beauty and even personal preferences, they will form different conceptions of the expected effect of shaping a given stump and adopt different artistic techniques; at the same time, some stumps can be shaped in multiple forms, so do not rush to work. Be patient, consider fully, compare repeatedly, maximize strengths and avoid weaknesses, act according to the stump, and be sure to find the viewing face that is most prominent, most distinctive, able to show the most beauty and avoid the most ugliness. Have a clear plan in mind, and wait until the tree's vigor recovers before starting the shaping work. For choosing the viewing face, one can draw a sketch of the expected shaping effect, or ask experienced friends or experts for diagnosis or guidance, and choose the best plan as far as possible. Once the viewing face is determined, the roots, trunk, branches and leaves, that is, from the skeleton to the crown, must all be shaped one by one to achieve the most beautiful result for this viewing effect. If the viewing face is chosen inaccurately, or changed at will midway, not only may all previous work be wasted and much time thrown away, but the potential viewing effect may also be greatly reduced; if first-rate tree material produces a third-rate viewing effect, is that not regrettable?

After determining the viewing face, the most important thing is to handle the trunk well. The trunk is the main line of a tree-stump bonsai and the key to shaping; the changes of the trunk determine the tree's posture, and only when the trunk is well worked can the beauty of a work be fully expressed. In nature, tree trunks are of a thousand postures: some towering and upright, standing between heaven and earth; some slanting and sweeping sideways, as if overhanging water; some crooked and plunging, with the momentum of a roaming dragon; some lean and tall, elegant and strange; some short, sturdy and majestic, ancient and simple. In summary they can be divided into straight trunk, slanting trunk, curved trunk, lying trunk, or single trunk, double trunk and multiple trunk; in bonsai presentation forms there are also turning-back, scooping-the-moon, hanging-on-the-cliff and so on. For Masson's pine, apart from multiple-trunk forest stumps being extremely rare, all other forms exist, and there are many strange and unusual stumps, which is favorable for innovation in shaping.

After selecting the trunk according to the best viewing face for a Masson's pine stump, the method of trunk chopping and branch training can be used: choose the most valuable section from the base upward and chop the trunk there, chopping just right. Because Masson's pine branches and trunk do not sprout new buds without needles, the upper end of the cut must retain a needle-bearing lateral branch to thicken and extend the trunk. If an old trunk does not have lateral branches on both sides, leave the cut about 5 cm long and seal it with grafting tape or plant ash to prevent dieback or sap loss; wait until the lateral branch grows strong before doing further work and trimming.

The general requirement for the trunk of a tree-stump bonsai is natural taper from bottom to top, moderate curvature, rich variation, and decreasing segment by segment. The viewing face should be the standard, so that the trunk curves and changes at different angles, with large amplitude left and right and small amplitude front and back; the angle of curvature and the length of each segment should be full of variation, naturally relaxed, balanced and coordinated, presenting as much as possible the beauty of curves with a sense of motion and force, and avoiding being too even and mechanical. A straight trunk lacking variation and hard to work can be made into a "welcoming-guest pine." For shaping the extending posture of the trunk, simple tools can be used, mechanical principles should be applied, a good bending angle chosen, and strong pushing, propping, pulling and hanging carried out. Practice has proved that a branch or trunk about 4 cm in diameter can likewise be strongly bent, without grooving or making wedge-shaped cuts. During the operation, take care to protect the rough bark, and pad properly at the stressed points. Masson's pine stumps with multiple trunks from one root are very rare, but they can be planted together. For the multiple-trunk form, besides noting the variation of each single trunk, one should consider all the more the overall effect, the coordination among trunks, the primary-secondary response, and so on, such as double-trunk "brother trees," "grandfather-grandson trees," one straight and one slanting, double slanting and so on; for three or more trunks, the trunks should not be lined up in one plane but should have depth, a sense of perspective, combination and mutual regard.

The shaping of Masson's pine bonsai branch pads requires expressing the pine's style according to its growth laws in nature. Whatever the tree form, all must have moderate curvature, a vigorous and smooth line of movement, with the main branches extending flat and slightly drooping, and with graded branching, clear veins, forming branch pads. One may appropriately make hard-angle dead bends and soft angles that show force, combining straight lines and soft curves, achieving both firmness and softness, both firm and gentle, beautiful and enduring to view.

Because the old trunk of Masson's pine is extremely hard to sprout new buds from, the existing branch pads of the stump should be fully considered and used; especially for a slanting trunk, the bottom pad is even more precious, and if pads can be kept without gaps, keep them. However, the so-called borrowing of pads or branches, twisting and winding to force a fill-in, is not advocated. Borrowed pads may sometimes look acceptable in a flat view, but they are always a flaw; the branch position is wrong, cannot stand scrutiny, and does not endure viewing.

Missing pads on Masson's pine can be solved by grafting, generally using the T-shaped approach graft; bud grafting is very hard to succeed. The grafting method is the same as for other tree species. The grafting time should be in the growing season. Before grafting, the old bark at the grafting site on the old branch must be peeled away. The operation must be accurate and quick, and the tying must be firm, to prevent sap (rosin) from congealing into a film that blocks cell penetration and growth. After tying, apply dual-purpose grafting tape or wrap with adhesive tape or plastic film to keep out water; once success is confirmed, gradually wean it, and only completely sever it in the second year's growing season. In Guangdong, trunk-piercing approach grafting is also used: drill a vertical hole at the position on the trunk where a pad is needed, remove the needles from the front end of a branch of slightly the same diameter and pass it through the hole leaving the bud tip, press the cambium layers tight on one side, then bind and fix it; the effect is also very good.

In shaping the branch pads, the first pad must be well positioned and well made, and grown as far as possible to coordinate with the trunk. For a horizontal viewing effect, its thickness should be one-third to one-half of the trunk, its emergence position lower, and its extension longer, possibly longer than the trunk; for a vertical viewing effect, its emergence position can be higher, its thickness thinner, and its extension shorter. It is most ideal for it to emerge at the golden-section point of the trunk, not at the exact middle half. The first pad should be the thickest and longest branch pad of the bonsai, and thereafter the intervals between pads and the thickness of the pads should progressively shorten and shrink upward level by level. The branches emerging from each pad should be in multiple directions, staggered from one another, with vivid lines of movement, rich in three-dimensionality, and broadly unified and coordinated as a whole. Pads emerging flat and straight at the front should be corrected and adjusted, so as not to be harsh to the eye and pierce the center. All pads should preferably emerge slightly below the sunny side of the trunk; emerging exactly at a convex corner will disperse the tree's force, while emerging at a concave position on the sunny side is neither attractive nor in line with the tree's growth laws. The first, second and third pads of the bonsai should be made clean and crisp, so that the lower two-thirds of the trunk can be clearly explained and clearly visible; the upper one-third may be less particular, but the top of the trunk must appear partly hidden, the crown fairly dense, and the proportions reasonable, to prevent the "exposed neck" or "shrunken neck" phenomenon. The branches at the top may run slightly upward, and the top crown is generally flat-topped.

The branch shaping operation for Masson's pine differs from the usual pine method, which is mainly binding, pulling and hanging; it must emphasize the word "cut," combining cutting and truncation, twisting, forcing buds and controlling needles, with binding, pulling and hanging. Only by continuous reasonable cutting and truncation can level-by-level branching be cultivated; only by using cutting and truncation to force buds and control needles can the tree form become compact, the needles shorten, and pads form naturally; only by combining cutting and truncation with binding, pulling and hanging can the branches and trunk extend with hard angles and soft angles, straight lines and curves combined, full of variation and showing full force, so that the rugged, vigorous trunk and the green, soft needles set each other off, presenting a beauty of combined firmness and gentleness with endless charm, beyond the reach of other pines.

Masson's pine wood fiber is long and tough, extremely easy to bend and twist. For thicker branches, at the part to be bent, wrap with packing tape or electrical tape and densely wind with aluminum wire, then use a simple tool with pulling and propping functions to bend forcefully, then find a way to fix it; with proper operation the angle of direction change can exceed 90%. For thin branches under 2 cm, one can directly use the hand to loosen the part to be bent and twist forcefully; as long as you feel the wood crack slightly and the fibers loosen, the branch becomes very soft and can be bent into place as required, then bound and fixed. For even smaller twigs, aluminum wire can be wound around them, and they can be pulled, hung and twisted at will to bend. During branch working, if cracking or breaking occurs by accident, as long as more than one-third of the bark and wood fiber remains intact, bind it immediately with tape; the wound will heal by itself, appearing even more aged. Masson's pine branches and trunk set into shape fairly quickly: about half a year for large ones, one or two months for small branches. Observe carefully and remove the binding aluminum wire in time, to prevent the branch from growing and embedding the wire in the bark. Branches to be twisted and worked must be fully lignified; young shoots whose wood fiber has not yet formed are brittle and extremely easy to break.

Most wild Masson's pine stumps have long, drawn-out branches, few branch divisions, and even fewer buds near the trunk; added to this, the old branches' needles fall off, making them appear especially loose and scattered. The method of forcing buds can be used to make the tree form more compact. So-called forcing buds means cutting back and retracting the ends of overly long branches that lack bud points, with the aim of reducing most branches and leaves, forcing the nutrients to draw inward, and stimulating the growth of new bud points closer to the trunk; after the new buds flush needles and mature, cut back and retract again to force new bud points, until the new bud points meet the shaping requirements, thereby growing the second section or second-level branching. When forcing buds, be careful not to knock off the retained needles; a branch without needles will not sprout and will recede and die. Needles fall off automatically after two years of growth, so branches needing bud forcing should be cut back before the needles fall, and the retained needles should number four bundles or more. For branches with aged wood, they must be grown strong so the bark color lightens and the bark layer loosens before cutting back; aged branches lack sprouting ability. For branches of the first section that still need to thicken, bud forcing can continue on the second section or on branch divisions, but the original branch must be retained or a vigorous branch added and allowed to grow to thicken it. If because of regional factors the shaping time needs to be shortened, for main branches that already have second-level branching, one can use twisting and pulling-hanging shaping, without section-by-section cutting and truncation to build up the form.

Masson's pine needles tend to be long, reaching about 25 cm in natural growth, and mostly soft and drooping, which affects the shaping effect, so needle control becomes an important part of shaping. Practice has proved that with proper needle control, the needles can be kept to about 4 cm, with a viewing period of more than four months. Masson's pine normally sprouts new buds twice a year, in February and August. After the branches have been bud-forced into denser branching and the tree's framework has basically formed, needle control must be carried out to improve the viewing effect. The method of needle control is to carry out synchronized overall retrenchment pruning of the branches, or in mid-July to cut back all branch tips according to the crown shaping requirements. For individual ones inconvenient to shorten, also cut off the tip buds; as long as three or more bundles of needles are retained, multiple new buds will certainly sprout at the cut; if the tree is vigorous, more than ten new buds can sprout from one cut. After the new buds begin to flush needles, strictly control water and thin the buds in time; at all cuts leave only two to three buds in appropriate growth directions, and remove all the rest. In this way, by "May 1" or "October 1" needles about 3 cm long will have grown; at this point simply remove the old needles and the viewing effect will be fully displayed. If handled properly, when the needles reach about 4 cm they basically stop growing; at this time the delicate needles, with a green color as if about to drip, are no inferior to the five-needle pine and can rival the Japanese white pine, delighting the eye and pleasing the heart. For needle control, note that half a month before retrenchment pruning, apply a light fertilizer to keep the tree vigorous and full of vitality; a tree that is too weak cannot undergo needle control, otherwise the leaf color will turn yellow, the buds will become thin and long, the needles will be sparse and not grow, and the tree's vigor will remain poor for a long time or even lose branches, so needle control can only be done once a year. Before the new needles mature and the second flush occurs, another light fertilizer should be applied to restore the tree's vigor. As the bonsai undergoes needle control, its branches and leaves become denser and denser, so retrenchment pruning must be combined with crown shaping; the crown's overall effect should form a scalene triangle, and the boundary curve should not be too smooth but should have undulations and variation, slightly wild. The needles should be in clumps and clusters, staggered and scattered, though divided into flowing forms, yet with proper density, full of charm, like the internal veins of a natural gemstone, fully presenting natural beauty; cutting too regularly, neat and uniform into pads, instead reveals artifice.

The shaping of Masson's pine bonsai must also pay attention to the flat-view effect. Some bonsai differ greatly between the real scene and the photographic viewing effect; this is the issue of whether it is photogenic, that is, the issue of the flat-view effect. A bonsai must be photogenic; in the form of photographs it is convenient to exchange, and can also be preserved and handed down. At the same time, by comparing photographs it is easier to discover problems, find shortcomings, and keep improving. Therefore, at different stages of each creative process, corresponding photographs should be taken for comparison, and a simple photo album file established, so that it can be consulted, appreciated and used at any time.

V. Maintenance and Management

Because bonsai is a living art, its creation has no end point; if there is an end point, it is the end of its artistic life. Therefore the process of maintenance and management is the continuation and extension of shaping. For pine bonsai, with reasonable maintenance, the longer the time, the longer the time, the more perfect the shaping will become; the pine lives very long, and pine bonsai are works handed down through generations, so maintenance and management are all the more important.

Masson's pine tolerates poor soil in the pot, yet also likes fertilizer. During the stump-growing period, apply light fertilizer frequently; in late spring and early summer and in autumn, apply once a month with thoroughly rotted cake fertilizer diluted 20 times. For those in larger pots with well-developed roots and good growth, the frequency of fertilization can be appropriately increased. If conditions permit, apply thoroughly rotted shell fertilizer or fish fertilizer, which is most effective for building vigor; high-quality granular compound fertilizer can also be used with caution. Generally do not apply nitrogen fertilizers such as urea or human waste, because pine needles can absorb nitrogen from the air and pine roots are sensitive to nitrogen. Do not fertilize in midsummer, severe winter or the spring rain season. Applying liquid fertilizer in the afternoon when the soil is on the dry side is most suitable; after applying, water once more to facilitate root absorption. Masson's pine must never be given raw or concentrated fertilizer; raw fertilizer burns the roots, and overly concentrated fertilizer will make the needles grow excessively, damage the roots, and even cause sap to flow backward, making the plant lose water and wither.

As the saying goes, "dry pine, wet cypress"; Masson's pine likewise fears waterlogging and standing water and likes to be on the dry side, but not that the drier the better. In fact, as long as the soil is loose and the bottom drains, the soil should be kept often moist. In the high-temperature period of summer, water thoroughly once each morning and evening; avoid watering at noon, which burns and suffocates the roots. In other seasons, decide according to the weather; in winter, water once every three or four days, but it must be thorough. Masson's pine maintenance is in fact fairly extensive, not as difficult as imagined. A potted Masson's pine, as long as the potting soil drains, the pot size is moderate, generally needs no repotting; as long as fertilizer and water are proper, it will still send out new shoots every year and grow well even without repotting for three to five years or even ten or eight years. If the plant is found to be weakening, the cause must be checked, and it should be repotted with fresh soil or moved to a larger pot at any time. Normal repotting should be done in late autumn or early spring. Before repotting, first control water to make the potting soil on the dry side, so the soil separates from the pot wall, then tip the plant out of the pot with its soil ball, trim the aged roots at the bottom and around the sides, remove part of the old soil in the middle of the soil ball, and replace with fresh soil.

Maintenance and management is the continuation and extension of shaping; preserving shape, reshaping or reworking are important contents of Masson's pine bonsai maintenance and management. First, as branches grow and thicken, continue to adjust the tree form; second, continue to force buds, thin buds, thin branches and control needles, fine-tuning the tree form, strengthening the awareness of fine work, and striving for ever greater refinement. With two flushes of sprouting each year, cut once and let flush once; prune in time before the needles fall, making sure to keep the tree form compact, the lateral branches and branching richer and more reasonable, and the plant's shaping more perfect.

Masson's pine has strong disease resistance and few pests and diseases; the main ones are longhorn beetles, pine aphids, pine scale insects, rust disease and so on. Longhorn beetles do damage mostly in early summer; observe morning and evening, catch and destroy the adults. If a saliva-like sticky liquid is found attached to a branch or trunk, it is certainly recent drilling and egg-laying; or if the wood at the hole is seen to have larvae boring into the heart, immediately use omethoate, dichlorvos and the like to kill the larvae by fumigation. Other pests and diseases can be controlled with corresponding conventional pesticides.

Cultivation Techniques for Masson's Pine Bonsai: How to Shape Masson's Pine Bonsai

Masson's pine is currently a fairly sought-after "bonsai" on the flower market; with its unusual trunk shape and evergreen branches and leaves through the four seasons, using Masson's pine as a home decorative bonsai is a very good choice. So how should Masson's pine bonsai be planted? What points need attention? Let us look below at the cultivation techniques for Masson's pine bonsai.

I. Introduction to Masson's Pine

Mountain pine, also known as Masson's pine, is a common tree species; material that can be made into bonsai is relatively scarce, and it grows slowly, making production and maintenance difficult, but its tree form is beautiful and can express many kinds of artistic conception, so it is relatively precious.

II. Origin and Distribution

Its distribution is extremely wide: in China from Henan and southern Shandong in the north, south to Guangdong and Guangxi, Taiwan, east to the coast, and west to central Sichuan and Guizhou, spread across the central and southern provinces. Generally it is distributed in mountainous areas below 600-700 m in the lower reaches of the Yangtze River, below about 1,200 m in the middle reaches, and below about 1,500 m in the upper reaches.

III. Morphological Characteristics

Evergreen tree, up to 45 m tall, 1 m in diameter at breast height; the crown is narrowly conical in the vigorous period, and in old age spreads like an umbrella canopy. The bark is reddish brown, in irregular flakes. First-year twigs are light yellowish brown, in whorls. Winter buds are cylindrical, brown. Leaves in bundles of 2 needles, rarely 3 needles per bundle, 12-20 cm long, soft in texture, with fine serrations on the margin; resin canals 4-8, marginal. Cones are long ovoid, 4-7 cm long, 2.5-4.0 cm in diameter, with a short stalk.

IV. Growth Habits

A strongly heliophilous tree species, not tolerant of shade. It likes a warm, humid climate and has poor cold tolerance, able only to withstand short periods of -20°C low temperature.

V. Cultivation Techniques for Masson's Pine Bonsai

Long-growing, dwarfed, vigorous and aged Masson's pine "small old trees" can be used to make bonsai. Dig them before the new buds sprout in spring; when collecting, it is best to keep a soil ball or dip the roots in mud on the spot, and put on a plastic bag to keep the roots moist during transport. Before potting, first prune and shape the stump, cutting away excess branches, trunk and roots to reduce water evaporation, and apply wax or gibberellin eye ointment and the like at the cuts to prevent wound infection. First plant it in a relatively large clay pot to "grow the stump"; the soil should preferably be sandy soil with good drainage and aeration and not containing too many nutrients. After planting, place it in a sunny, airy place for maintenance. If the weather is clear, shade it appropriately, especially avoiding direct strong light at noon, and spray water on the branches, trunk and leaves. Moss can also be used to wrap the main branches and trunk to keep them moist, but the potting soil should not be waterlogged, to prevent root rot. A surviving Masson's pine must go through one or two years of maintenance and grow luxuriantly before shaping, otherwise the stump is liable to die.

From the winter dormancy period to before spring sprouting, the sap flow of Masson's pine is slow, making it the most ideal period for shaping. Common forms include straight-trunk, slanting-trunk, double-trunk, cascade, waterside and tree-on-rock styles; whatever the form, it must conform to natural laws and yet have high artistry, achieving the artistic effect of "coming from nature and yet higher than nature." Shaping methods differ by region: Lingnan commonly uses the method of "branch accumulation and trunk chopping," making the transitions between branches and trunk, main branches and lateral branches, and lateral branches and twigs natural; while the Jiangsu-Zhejiang region mainly uses "hanging and binding, supplemented by pruning," gradually cutting away excess branches and trunk during shaping, and adjusting the growth direction, position and form of the retained branches and trunk by hanging and binding. Some branches can also be peeled and coated with lime-sulfur mixture to make "jin" (deadwood), but it should not be overused, otherwise it is like gilding the lily. A finished bonsai can be moved into a purple-clay pot or other viewing pot before spring sprouting. Raise the roots as needed, so the bonsai has suspended roots and exposed claws, increasing the bonsai's ancient charm.

Masson's pine likes a warm, dry, sunny environment, tolerates poor soil and drought, fears waterlogging, and requires good ventilation. Do not fertilize too much; applying thoroughly rotted cake fertilizer once each autumn is enough to meet its growth needs. In northern regions, Masson's pine must be moved into a cold room to overwinter; in the south it can overwinter outdoors in a wind-sheltered, sunny place. Repot once every two or three years before spring sprouting; the potting soil should be loose, breathable and well-draining; sandy soil mixed with 1/3 leaf mold can be used after mixing evenly.

Shaping of Masson's pine is carried out during the winter dormancy period: cut away small branches that affect the tree form, and adjust the positions of other branches so they are reasonably distributed. Carry out a comprehensive bud removal once each year in April and May, to control excessive growth and keep the bonsai attractive. The biggest shortcoming of Masson's pine bonsai is that the needles are rather long, not well coordinated with the ancient-looking stump. Besides controlling water and fertilizer to suppress its growth, the needles can also be cut short, but the cut ends tend to turn yellow and discolor.

Every family hopes its home has a positive, upward atmosphere, and the evergreen character of Masson's pine through the four seasons can serve exactly this purpose. So if you like plants, you can follow the above cultivation techniques for Masson's pine and try growing a pot!

How should Masson's Pine Bonsai be Cared For?

In today's home life, people's requirements for the home environment are getting higher and higher. Owners who like planting will keep some flowers and plants at home, adding color to life and also playing a decorative role for the home environment. Masson's pine bonsai is a green plant suitable for indoor cultivation. How should Masson's pine bonsai be cared for? What points need attention in growing Masson's pine bonsai? The editor has carefully prepared some knowledge here; let us go and learn about it together, and I hope the editor's content is helpful to you!

Care of Masson's Pine Bonsai

4. For transplanting Masson's pine bonsai by grafting, a vertical hole must be pierced through at the trunk position, and the branch to be transplanted fixed in place; the grafting takes about one year.

Problems to Note in Planting Masson's Pine Bonsai