Detailed Explanation of Daphne Bonsai Production Methods and Steps

Bonsai Production (I) Botanical Knowledge

Belongs to the Thymelaeaceae family, Daphne genus. Evergreen shrub, smooth stems. Leaves alternate, long elliptic, mostly clustered at branch tips, entire margins, deep green and glossy. Flowers bloom from March to May, capitulum terminal, corolla yellow-white to light purple, lilac-shaped, strongly fragrant. Daphne branches spread gracefully, with soft twigs and thick leaves, elegant and beautiful in posture.

(II) Material Collection and Cultivation Measures

Artificial propagation: Daphne propagation mostly uses cuttings and layering methods, and can also use water cuttings, division, and seed sowing methods. Cuttings can be taken in all four seasons, but early March to late June is the best time for cuttings. For spring cuttings, select vigorous one-year-old branches as cuttings, about 5-10 cm in length. One day before cutting the branches, use a sharp knife to make a ring cut at 0.1 cm from the branching point to promote healing and rooting. For those ring-cut at the branching point, cut off at the appropriate time and trim the cut surface flat; the upper part of the cutting should retain 2-4 leaves. For those not ring-cut at the branching point, if there are several divisions they can be separated for cutting. Insert to a depth of about 1/3 or 1/2, not too deep. For home cuttings, a cutting pot can be used; for large-scale cuttings, a seedbed must be used. The seedbed soil should be loose, fertile, well-drained, slightly acidic soil. After insertion, a protective shed must be built to guard against sunlight and rain (bamboo strips can be arched into a 50-60 cm high frame, covered with plastic film). When the temperature is too high, a corner of the film shed must be opened for ventilation. Pay attention to controlling moisture, not too wet. Generally, spring cuttings can root in about 30 days, and can be divided and transplanted in about 2 months. If cuttings are taken in summer and autumn, select semi-lignified new branches of the current year, choosing vigorous branches about 8 cm long, with a heel on the branch. After insertion, keep the seedbed soil moist, and pay attention to heat preservation when the temperature drops. Generally they can also root in about 40 days, and after the weather warms the following spring they can be transplanted for cultivation.

Layering propagation usually can use the air layering method. The best time for air layering is from May to June. First select suitable branches, determine the layering position, use the notching method to make one or two transverse cuts or girdling at the layered position, with the cut reaching the xylem, then use a plastic bag or a half-split bamboo tube to wrap the cut position, tie the lower end tightly, apply growth hormone at the wound, then fill in prepared culture soil, and tie the upper end of the bag tightly. Keep the soil in the bag moist, and fix the layered branch well to prevent breakage. Generally rooting occurs in about 40-50 days, and after about 2 months it can be cut from the mother branch and potted for cultivation. Propagating Daphne by the water cutting method is simple and easy, and the survival rate is also relatively high.

(III) Potting Process

Pot selection: Daphne is suitable for a slightly deep round pot or square pot; oval or rectangular pots can also be used. The pot material is best purple clay pottery. The pot color can be choisya yellow or light gray, to set off the green leaves and white flowers, producing an effect of eminence.

Soil: Daphne likes to grow in fertile, loose, well-drained sandy loam, requiring slightly acidic soil with a pH value between 6-6.5. For potting, use leaf mold or sun-dried, weathered garden soil mixed with an appropriate amount of rice husk ash or sand.

Planting: It is suitable to pot and plant in April in spring. At this time the climate is mild and humid, with a small temperature difference between day and night, which is conducive to Daphne establishing in the pot and growing. Autumn planting is also acceptable; when transplanting, more original soil must be kept, and the branches should be properly pruned.

(IV) Styling Techniques

Processing: Daphne bonsai is suitable for wire training, combined with pruning for shaping. But be careful to remove the wire in time to avoid wire bite, which affects appearance and growth. Processing and shaping are suitable during the dormant period, and can also be done after flowering.

Tree shape: The tree shape of Daphne bonsai is suitable to be made into a natural large tree form. The branches and trunk should be upright, elegant and spreading, and attention should be paid to appropriate sparseness and density, so as to benefit from elegant branches and abundant flowers, rich color and fragrance, and increase the ornamental effect.

Common Problems

Heart rot and root rot phenomenon

The occurrence of heart rot and root rot in Daphne cultivation is mainly caused by improper management. Daphne adapts to warm climates, but is not tolerant of strong light and prefers semi-shade; its roots are fleshy, tolerant of dryness and averse to wetness. In high-temperature and high-humidity seasons, mosaic disease is likely to occur. Infected plants show colored spots and deformities on the leaf surface, while flowering is poor, and heart rot appears. Control methods: before the high-temperature and high-humidity season arrives, spray Bordeaux mixture 2-3 times, and place in a cool place. If heart rot is found, promptly cut off the branches, leaves, and flowers, and burn them to prevent spread. In particular, golden-edged Daphne is delicate and difficult to grow, afraid of humidity and low-pressure climates; cultivation should choose a high and airy place and strengthen protection. During the growth period, attention should be paid not to apply heavy fertilizer or water heavily, and keep the pot soil in a semi-moist state. In summer, avoid windstorms, rain, and sun showers. If suddenly hit by wind and rain, it will immediately wilt and die. When such a situation is approaching, move it indoors in advance to take shelter; if it has already been hit by wind and rain, promptly use a knife on the thick branches and trunk to make a vertical cut from the cortex to the xylem 1-1.5 cm long, so that excess water and gas in the plant body can be released, facilitating normal growth. If the plant leaves are found drooping, completely losing luster, and fine wrinkles appear, it indicates that the roots have begun to rot. If it is just starting, it can still be rescued: dig out the seedling, wash the roots with clean water, cut off the rotten roots, then move it into a new pot, cover with plastic film and place in a cool place. If after two weeks the leaves are upright, it has been saved.