How to grow an asparagus fern bonsai? Detailed explanation of cultivation methods and precautions

The asparagus fern is also known as cloud-pine, spiny asparagus, and cloud bamboo, among other names. It is a perennial plant in the genus Asparagus of the family Asparagaceae, native to South Africa, and distributed across central China, the northwest, the Yangtze River basin, and various places in the south. It can reach several meters in height and is a highly ornamental plant. It can be placed in the living room or study, purifying the air while also adding a scholarly atmosphere. Now let us take a look together at the cultivation methods and precautions for the asparagus fern!

The growth habits of the asparagus fern

The asparagus fern likes a warm, humid, semi-shady, and well-ventilated environment. In winter it is not tolerant of severe cold or drought, and cannot be watered too much or its roots will rot. In summer it should be kept out of direct sunlight. It is best cultivated in loose, fertile, well-drained sandy loam rich in humus. The room temperature is best kept between 12-18°C; when it exceeds 20°C, ventilate to dissipate heat. The optimal growth temperature is 15-25°C, and the overwintering temperature is 5°C.

Propagation methods for the asparagus fern

The asparagus fern is mostly propagated by division. Plants 3-5 years old grow densely and can be divided. Division is carried out in spring when repotting. Use a sharp knife to divide the clustered stems and roots into 2-3 clumps, with each clump containing 3-5 buds, then plant them separately in pots. When dividing, damage the root system as little as possible. After dividing and planting, water thoroughly, place in a semi-shady spot, and pay attention to moisture retention and shading. Afterward, watering should be controlled appropriately, otherwise yellow leaves are easily caused.

Cultivation methods for the asparagus fern

1. Potting soil: The potting soil for cultivating the asparagus fern should preferably be fertile sandy loam, requiring warmth and moisture, rich in humus, and with good drainage. Generally, a ratio of 4 parts garden soil, 2 parts leaf mold, 2 parts compost soil, and 1 part sand can be used, and regular soil changing and fertilizing should be done. If over-fertilizing causes "root burn," the pot needs to be turned out to remove the fertilizer, and the soil ball rinsed with clean water, then replaced with new soil for cultivation.

2. Watering: Watering is the key point in cultivating the asparagus fern. Too much watering and overly wet potting soil easily cause root rot, while too little watering leads to scorched and yellowing leaf tips. Therefore, in the watering process, it should be determined by the weather, growth condition, and the dryness or moisture of the potting soil, following the principle of not watering when dry, and watering thoroughly when watering. In hot and dry weather, the leaves can be sprayed with water to increase humidity and lower temperature; in winter, water less.

3. Fertilizing: The asparagus fern does not like much fertilizer, but it also cannot lack it. Limited by the potting soil of container cultivation, the asparagus fern must be supplemented with nutrients in time to meet its growth requirements. In the fertilizing process, apply small amounts frequently, and do not apply concentrated fertilizer, otherwise yellow leaves will result. Generally, applying a thin, fully decomposed liquid fertilizer once a month is sufficient. After the plant has grown and taken shape, fertilizing can be appropriately controlled and reduced. During the growing season, apply a thin fertilizer containing nitrogen and phosphorus 1-2 times a month to promote lush branches and leaves; other liquid fertilizers may also be used. Note that during the flowering period, do not fertilize too much; applying liquid fertilizer twice each in May-June and September-October is sufficient.

4. Light: The asparagus fern must not be exposed to the scorching sun when cultivated. In hot seasons, it should be placed in a cool and ventilated place. At the same time, during the flowering period, the asparagus fern is afraid of both wind and rain, so attention should be paid to good ventilation. In good weather, it can be appropriately placed outdoors to receive sunlight. In winter, the temperature for potted asparagus fern should be kept above 5°C to avoid freezing.

5. Placement: The asparagus fern loves a clean and air-circulating environment. If stimulated by harmful gases such as smoke, dust, coal gas, and pesticides, its leaves will turn yellow, curl, and even die. Therefore, the asparagus fern should be placed in a clean and well-ventilated environment, away from marble-type decorative materials that release mercury gas.

Precautions for cultivating the asparagus fern

1. The asparagus fern is not cold-tolerant and cannot overwinter outdoors in the north. When the temperature drops, the asparagus fern should be moved indoors in time. In winter, it needs a growing environment above 15°C.

2. Do not water frequently; frequently spray water on the leaf surface. In summer, spray water on the leaf surface 1-2 times a day; in winter, while keeping the soil moist, spraying water on the leaf surface once every 3-4 days is sufficient.

3. Keep the potting soil semi-dry and slightly moist. Potting soil that is too dry will cause the asparagus fern's leaves to turn yellow or its branches and leaves to scorch and wither.

4. Do not use tap water to water the flowers directly; it should be left to stand for 1 to 2 days in advance, and the water temperature should not be too cold.

5. Do not apply raw fertilizer (some people directly pour child urine onto the roots of the asparagus fern, resulting in the roots being burned to death). Raw fertilizer must be decomposed first.

6. In spring and autumn, apply thin fertilizer once a week; in winter, apply thin fertilizer once every half month. It is best to use compound flower fertilizer.

7. The asparagus fern does not like smoke and dust. In winter, if a coal stove or charcoal fire is used for heating, proper ventilation should be provided every day.

8. The asparagus fern should be kept away from marble-type decoration items. The asparagus fern has a strong ability to absorb mercury gas, but note that when the asparagus fern absorbs mercury gas, it also harms itself. Therefore, when placing the asparagus fern, it should be kept away from decorative materials that release mercury gas.

9. The asparagus fern should be pruned in time. Branches that are too dense affect ventilation, light, and ornamental value, so they should be pruned in time. If the suckering roots multiply too much, they should also be divided into pots in time.

10. Tying the asparagus fern can make its posture more beautiful, but it is not suitable to use too-thick string or string with too great a color difference. Bamboo strips and wooden strips also should not be too thick, otherwise the slender asparagus fern will be made to look too delicate and weak by contrast.

How to make an asparagus fern bonsai

1. Material selection: one asparagus fern about 20 cm tall, two asparagus ferns over 10 cm tall, an irregular white marble shallow pot with its matching stand, several landscape stones about 10 cm tall, an appropriate amount of potting soil and green moss.

2. Bonsai shaping: Spread a thin layer of potting soil on the surface of the white marble shallow pot. Plant the tallest asparagus fern with its curved branches and leaves facing left at the right end of the pot. Plant the second-tallest asparagus fern not far to the left of the first asparagus fern, appropriately near the back edge of the pot. Then plant the shortest asparagus fern at the junction of the front 1/3 and rear 2/3 of the pot's length, with its curved branches and leaves also facing left, so as to achieve a coordinated and unified orientation of the three asparagus ferns. Then adjust the positions of the asparagus ferns in the pot until they are natural and beautiful.

3. Placing stones and laying moss: Place several landscape stones at an appropriate position toward the right rear on the pot surface, and cover the potting soil on the pot surface with green moss to achieve a greening artistic effect. Finally, spray clean water onto the asparagus ferns and green moss to moisten the potting soil.

How best to prune the asparagus fern

1. Pruning for missing cladodes: When the growth position of small cladodes on the main branch is unsatisfactory or they are missing for some reason, short pruning can be carried out at an appropriate position on the main branch to force the dormant buds there to sprout. Generally, the height of the cut is the height at which the cladodes sprout, and the position of the thorns on the branch is the position at which the cladodes sprout. The greater the thickness of the branch, the higher the sprouting rate of the dormant buds.

2. Whole-plant renewal pruning: If the branches and leaves of the whole plant grow poorly due to strong sunlight scorching, overly dry potting soil, lack of fertilizer, or some unknown reason, whole-plant renewal can be carried out. During renewal pruning, all cladodes can be cut off, but attention should be paid to the positions where the backward thorns on the branches grow, because they determine whether the distribution of the retained branches is uniform. Pruning during the growing season generally makes it easy to sprout new branches. After pruning, watering should also be appropriately reduced. The potting soil absolutely must not be too wet, otherwise the pruning will fail.

3. Pruning of trailing branches: Trailing branches are generally weak in vigor and slender. If you do not want to keep them for propagation and want the plant shape to look good, they can be cut off from the base all at once. If you want to increase the number of cladodes or fill a certain gap, they can be short-pruned at a certain position. When pruning, special attention should be paid to comprehensive management such as small amounts of fertilizer.

Hydroponic cultivation methods for the asparagus fern

1. Select a robustly growing, well-developed asparagus fern as the mother material for hydroponics. Take the asparagus fern out of the flower pot together with the soil, carefully wash away the soil from its roots, remove rotten roots, and cut off some old roots. Clean the leaves and plant thoroughly with clean water, avoiding damaging the plant. The asparagus fern roots slowly, so be careful when taking it out and do not damage its roots.

2. Fix the cleaned plant with a planting basket, making sure its roots are fully spread out. Then place the plant together with the planting basket into a 1‰ carbendazim solution and soak the roots for 30 minutes. Put it in a cool place, and after the root system becomes soft, proceed to the next step.

3. Fill the nutrient solution tank with nutrient solution specially for asparagus fern, and plant the treated plant on a floating board (note to keep part of the root system exposed to the air). Spray water on the leaves twice a day. At a suitable temperature of 15-25°C, new roots will grow in two weeks. At this time, supplement foliar fertilizer once every week.

4. After three to four weeks, the asparagus fern root system has grown many new roots. At this point it can be transferred to a bottle for static hydroponics, preferably fixed with ceramsite.

5. The asparagus fern likes a semi-humid environment. Generally place it near a window with light, but not in a place with direct sunlight, and keep it ventilated. Under the container, still place a tray with water and replenish the water frequently.

6. For hydroponic asparagus fern, it is best to use nutrient solution specially for asparagus fern. The care of hydroponic asparagus fern is much easier than soil cultivation. Usually you only need to pay attention to changing the water: about 7-10 days in summer and about 20 days in winter. Each time you change the water, replenish the nutrient solution.

Causes of yellowing leaves in the asparagus fern

1. Strong light exposure: The asparagus fern likes semi-shade when cultivated, and in summer it should not be exposed to strong direct sunlight, otherwise the branches and leaves will wither and yellow. The solution is to move the flower pot to a cool place and spray the branches and leaves more to increase humidity.

2. Improper watering: Although the asparagus fern likes moisture, it can also become waterlogged from overly wet conditions. Therefore, during cultivation it is best to keep the potting soil alternating between dry and wet. Generally, do not water when dry, and water thoroughly when watering, but when watering do not let too much water accumulate on the pot surface. If overwatering occurs, you can temporarily stop watering and instead only spray water on the leaves to keep the asparagus fern moist.

3. Improper fertilizing: Applying fertilizer that is too concentrated or applying undecomposed fertilizer will both cause the asparagus fern's leaves to turn yellow and fall off. In addition, potting soil that is too poor in nutrients will likewise cause the asparagus fern's leaves to turn yellow. Therefore, when fertilizing, pay attention to applying thin fertilizer, which can be done more frequently but in smaller amounts, and use decomposed fertilizer. For situations that have already appeared, changing the potting soil can be used to solve the problem. It is worth noting that fertilizing is not suitable during the low-temperature period in winter and the high-temperature period in summer.

4. Gas poisoning: The asparagus fern is very afraid of smoke and dust. If it is frequently exposed to harmful gases such as smoke and dust, the asparagus fern will show the poisoning phenomenon of yellowing branches and leaves. When this happens, promptly move the flower pot away from its original position and increase the work of sprinkling water on the leaves to remove dust.

5. Pest causes: Scale insects are the most common pest in asparagus fern cultivation. When scale insects are found, they should be promptly wiped off with a wet cloth strip. In severe cases, buy pesticides from a store for control, and change the potting soil in time. When changing the potting soil, old and residual roots can be cut off to reduce nutrient consumption.

6. Management mistakes: When cultivating the asparagus fern, it should be kept at a certain temperature, especially in winter when it should be placed in a sunny position. If the asparagus fern is kept for a long time in a place lacking light, poorly ventilated, and cold, it is very easy for its leaves to wither and dry up. In winter, the cultivation temperature for the asparagus fern generally must not be lower than 12°C, and it should be placed in a place with better light, and watering can be appropriately reduced.

A complete guide to the cultivation methods of asparagus fern bonsai

 The asparagus fern is native to South Africa and distributed across central China, the northwest, the Yangtze River basin, and various places in the south. It likes a warm, humid, semi-shady, and well-ventilated environment. In winter it is not tolerant of severe cold or drought, and in summer it should be kept out of direct sunlight. The asparagus fern is a plant with extremely high ornamental value. It can be placed in the living room or study, and while purifying the air it can also add a scholarly atmosphere. Its roots are used as medicine and can treat acute bronchitis; it has the function of moistening the lungs and stopping cough. Today we will briefly introduce the cultivation methods of asparagus fern bonsai for everyone.


Cultivation methods of asparagus fern bonsai - potting soil requirements:
      For the potting soil for cultivating the asparagus fern, it is suitable to use fertile sandy loam, requiring warmth and moisture, rich in humus, and with good drainage. Generally, a ratio of 4 parts garden soil, 2 parts leaf mold, 2 parts compost soil, and 1 part sand can be used, and regular soil changing and fertilizing should be done. If over-fertilizing causes "root burn," the pot needs to be turned out to remove the fertilizer, and the soil ball rinsed with clean water, then replaced with new soil for cultivation.

Watering method:
      Watering is the key point in cultivating the asparagus fern. Too much watering and overly wet potting soil easily cause root rot, while too little watering leads to scorched and yellowing leaf tips. Therefore, in the watering process, it should be determined by the weather, growth condition, and the dryness or moisture of the potting soil, following the principle of not watering when dry, and watering thoroughly when watering. In hot and dry weather, the leaves can be sprayed with water to increase humidity and lower temperature; in winter, water less.


Fertilizing method:
      The asparagus fern does not like much fertilizer, but it also cannot lack it. Limited by the potting soil of container cultivation, the asparagus fern must be supplemented with nutrients in time to meet its growth requirements. In the fertilizing process, apply small amounts frequently, and do not apply concentrated fertilizer, otherwise yellow leaves will result. Generally, applying a thin, fully decomposed liquid fertilizer once a month is sufficient.

      After the plant has grown and taken shape, fertilizing can be appropriately controlled and reduced. During the growing season, apply a thin fertilizer containing nitrogen and phosphorus 1-2 times a month to promote lush branches and leaves; other liquid fertilizers may also be used. Note that during the flowering period, do not fertilize too much; applying liquid fertilizer twice each in May-June and September-October is sufficient.


Light conditions:
      The asparagus fern must not be exposed to the scorching sun when cultivated. In hot seasons, it should be placed in a cool and ventilated place. At the same time, during the flowering period, the asparagus fern is afraid of both wind and rain, so attention should be paid to good ventilation. In good weather, it can be appropriately placed outdoors to receive sunlight. In winter, the temperature for potted asparagus fern should be kept above 5°C to avoid freezing.

Placement position:
      The asparagus fern loves a clean and air-circulating environment. If stimulated by harmful gases such as smoke, dust, coal gas, and pesticides, its leaves will turn yellow, curl, and even die. Therefore, the asparagus fern should be placed in a clean and well-ventilated environment, and kept away from marble-type decorative materials that release mercury gas.

Pruning and shaping:
      When the growth position of small cladodes on the main branch is unsatisfactory or they are missing for some reason, short pruning can be carried out at an appropriate position on the main branch to force the dormant buds there to sprout. Generally, the height of the cut is the height at which the cladodes sprout, and the position of the thorns on the branch is the position at which the cladodes sprout. The greater the thickness of the branch, the higher the sprouting rate of the dormant buds.

      If the branches and leaves of the whole plant grow poorly due to strong sunlight scorching, overly dry potting soil, lack of fertilizer, or some unknown reason, whole-plant renewal can be carried out. During renewal pruning, all cladodes can be cut off, but attention should be paid to the positions where the backward thorns on the branches grow, because they determine whether the distribution of the retained branches is uniform. Pruning during the growing season generally makes it easy to sprout new branches. After pruning, watering should also be appropriately reduced. The potting soil absolutely must not be too wet, otherwise the pruning will fail.

A complete collection of cultivation methods and precautions for the asparagus fern

The asparagus fern is not very sensitive to temperature. Generally, above 10°C is sufficient. Below 5°C, cold damage will occur. Between 15°C and 25°C is most suitable for the growth of the asparagus fern. When the temperature reaches above 32°C, the asparagus fern will stop growing. So what is included in the complete collection of cultivation methods and precautions for the asparagus fern?

1. Selection of flower pots for cultivating the asparagus fern

(1) Pot material requirements: Clay pots, plastic pots, porcelain pots, and ceramic pots can be used for cultivation.

(2) Pot size: The asparagus fern can be planted in pots with a diameter of 14-18 cm. Nowadays, flat bonsai pots are often used for cultivation.

2. Potting method for cultivating the asparagus fern

When the seedlings grow to more than 5 cm, they can be divided and potted, planted into pots with a diameter of 7-10 cm. The potting soil should preferably be mixed from 5 parts leaf mold, 2 parts garden soil, 2 parts river sand (sandy soil), and 1 part decomposed barnyard manure.

The asparagus fern is a flower cultivated for many years, but it should be repotted once every year before sprouting in early spring, removing the old soil and replacing it with new culture soil; according to the size and growth condition of the plant, change to a larger pot or still use the original pot; cut off dead branches and yellow cladodes to maintain a beautiful plant shape.

3. Watering method for cultivating the asparagus fern

Watering is the most critical issue in the cultivation and management of the asparagus fern. Therefore, watering becomes an important measure in whether the asparagus fern can be grown well. Too much watering and overly wet potting soil easily cause root rot and yellowing and falling leaves; too little watering and long-term drought in the potting soil easily cause yellowing and falling leaf tips. So during the growth period, the amount and frequency of watering should be determined by the weather, growth condition, and the dryness or moisture of the potting soil.

Watering should follow the principle of "dry then wet": do not water when dry, and water thoroughly when watering. That is, water when the surface of the potting soil appears dry, and water until water comes out of the bottom of the pot; do not give "half watering," that is, watering only enough to moisten the surface soil while the soil below remains dry, causing the bottom roots to be unable to absorb water, so the branches and leaves will also wither and yellow. When the weather is dry or hot, in addition to keeping the potting soil moist, it is also necessary to frequently sprinkle water on the ground around the plant and spray and wash the branches and leaves with clean water to increase air humidity. In winter, watering should be controlled and the frequency of watering reduced. Every 5-7 days, spray and wash the branches and leaves once with clean water close to room temperature to keep the plant tender, green, and fresh.

4. Light requirements for cultivating the asparagus fern

The asparagus fern is a shade-loving flower that grows well under scattered light conditions. In early spring and autumn, the sunlight is not strong, and placing it in a sunny indoor spot is beneficial to growth; in winter it should be placed in a sunny spot; after summer begins, it can be moved to a cool outdoor place without direct sunlight or to an indoor place with bright scattered light.

5. Fertilizing method for cultivating the asparagus fern

The asparagus fern rather likes fertilizer. To make the plant grow robustly, generally in spring and autumn, apply a fully decomposed thin organic liquid fertilizer once every 15-20 days. Nitrogen, phosphorus, and potassium chemical fertilizers can also be applied, using a mixed solution of 0.1% urea plus 0.1% monopotassium phosphate; stop fertilizing during the high-temperature summer and the overwintering period. However, during the growth period, fertilizing should also be controlled to avoid excessive vegetative growth and the production of long trailing shoots, which damages the plant shape and affects the ornamental effect. If you want the plant to stay low, apply less liquid fertilizer, especially less nitrogen fertilizer.

6. Four-season management for cultivating the asparagus fern

(1) Spring management

In March-April, repot the old asparagus fern plant, and prune appropriately before repotting. Because the asparagus fern likes a shady and humid environment, it can be placed indoors for viewing for a long time. However, because indoor air humidity is on the low side, attention should be paid to increasing indoor air humidity.

Spring temperatures are suitable, and the asparagus fern grows relatively vigorously. Seedlings can be top-dressed 1-2 times to ensure an adequate water supply, and at the same time attention should be paid to increasing air humidity, otherwise the leaf color easily ages and falls off, affecting ornamental value.

(2) Summer management

In summer, the asparagus fern can be placed in a brightly lit indoor spot, keep the potting soil moist, sprinkle water around it frequently, strengthen ventilation to lower the temperature, and do not fertilize.

(3) Autumn management

After the weather turns cool in autumn, the asparagus fern resumes growth, and attention should be paid to the supply of water and fertilizer and the supplement of air humidity. After the temperature drops in late autumn, attention should be paid to maintaining indoor temperature, and the asparagus fern should gradually be moved to a sunny spot by the window for cultivation, and the frequency of watering reduced, keeping the potting soil moist.

(4) Winter management

The asparagus fern is not cold-tolerant. When the temperature is below 5°C, it will cause leaf drop, so room temperature should be kept above 5°C. At this time the asparagus fern is in a state of stagnant growth, so a certain amount of light should be ensured, watering reduced, the potting soil kept slightly dry, and no fertilizer applied.

If room temperature is kept above 10°C, the asparagus fern can also grow normally, and the potting soil should be kept moist, with no fertilizer applied.

7. Precautions for cultivating the asparagus fern

(1) If new branches of the asparagus fern are found to be turning yellow, then apply decomposed 20-times liquid fertilizer or 1000-times urea solution 1-2 times, and appropriately increase morning and evening light.

(2) The asparagus fern likes warmth, loves moisture, tolerates semi-shade, and is not cold-tolerant. In the Jiangnan region it cannot overwinter in the open ground. Potted asparagus fern needs to be placed in a semi-shady place not directly exposed to the scorching sun in summer and autumn, and in winter it needs to be placed indoors in a south-facing, sunny, wind-sheltered spot.

(3) Potted asparagus fern especially needs to be cultivated in loose, well-drained sandy soil containing humus. For cultivating the asparagus fern, it is best to choose clay tile pots with good drainage and air permeability, and the lower layer should be lined with coarse sand and stones as a drainage layer.

(4) The most critical issues in the cultivation and management of potted asparagus fern are fertilizing and watering. Avoid rain exposure and direct sunlight, otherwise the asparagus fern easily suffers scorched tips and withered branches, and the plant color turns yellow. During the growth period, do not apply concentrated fertilizer. According to the growth condition of the seedlings, appropriately apply thin, light fertilizer to control nutrients, prevent the plant from growing excessively, and maintain a graceful plant shape. Generally, apply fully fermented and decomposed liquid cake fertilizer water (bean cake or rapeseed cake) once every 7-10 days, with a concentration of 30% fertilizer and 70% water. If the plant grows vigorously and produces trailing branches, support stakes can be set up or pruning and shaping can be appropriately carried out.

(5) Although the asparagus fern likes moisture, it should avoid overwatering. If too much water is applied, the accumulated water in the pot cannot drain away for a while, the roots easily rot, and the plant may even die. If there is too little water, dry potting soil will also cause yellow leaves or scorched tips. Therefore, whenever the soil surface turns white, water thoroughly. The standard to master is that after watering thoroughly, water can quickly drain from the bottom of the pot. It is best to keep it slightly wetter during the high-temperature growing season and drier during the low-temperature dormant season. In hot summer weather, it is suitable to spray the leaf surface; in winter, water close to room temperature can be used to spray and wash the leaves to keep the leaf surface clean and full of vitality.

8. Propagation methods for cultivating the asparagus fern

The asparagus fern can be propagated by sowing and division, commonly by sowing.

For sowing propagation, collect seeds after they mature, remove the berry skin, dry them in a shady place, and store them. Generally sow in the same year; the germination ability decreases the following year. Sowing can be carried out in March-April, and the seeds need to be soaked for 1-2 days before sowing. Use the dense sowing method, with seeds spaced about 2 cm apart, cover with soil 0.5-1 cm after sowing, maintain a certain humidity after sowing, and control the temperature at about 20-25°C. They can sprout and emerge in about 25-30 days. When the seedlings are 3-4 cm tall, transplant them once, with a plant spacing of 5 cm; when the seedlings are 5-7 cm tall, they can be potted for cultivation and care.

Division propagation mostly uses large plants 4-5 years old for division, but the propagated plants often have irregular plant shapes. Therefore, division propagation is mostly not used.

A complete collection of cultivation methods and precautions for the asparagus fern