Ginkgo biloba seeds are harvested in autumn and dried after removing the testa. They can be sown in winter or spring in the next year. During sowing, the embryo of seeds shall be placed horizontally in the sowing ditch, and the soil covering depth shall be about 3-4cm and lightly compacted. It is better to cover the soil with another layer of plastic film to keep the temperature and humidity. When the embryo is unearthed, the membrane is opened gradually. After falling leaves, they can be transplanted.
Cuttage Propagation can be divided into old cuttage and young cuttage.
The old branch cutting is suitable for large-area greening and seedling raising. Generally, from March to April, the first and second-year strong branches on the mother plant are cut into about 10-15 cm long cuttings. The cuttings are watered after cutting to keep the soil moist. Generally, it takes about 40 days to take root. The next spring can be transplanted
Twig Cutting is generally carried out in July. The selection of cuttings is to cut the semi lignified branches of the current year into cuttings of 2-3 buds, and then soak them in the rooting powder. Finally, the cuttings will keep the soil moist after cutting, properly ventilate and shade, and transplant them to wait for their roots.
Generally in spring, grafting was carried out by subcutaneous grafting, peeling grafting or cutting grafting. It is suitable to select about 4 short branches on 3-year or 4-year-old branches as scions, and each plant is generally connected with 3-5 branches. Generally 5 - 8 years after grafting can start bearing
The tillering propagation can be carried out by two ways: cutting off the original root tiller and cutting the root to promote the new tiller propagation. The seedlings propagated by tillering can be planted directly.
The former is generally carried out in July and August. The first step is to peel the tiller in a ring, and then to cultivate soil. After about a month, the new roots can be produced in the ring. In the next spring, they can be cut off from the mother body and planted directly.
Digging ditches and cutting roots to promote the development of new tillers is more than that in autumn. In the vicinity of Ginkgo biloba, dig a circular ditch about 50 cm deep and wide, cut off the lateral roots, and then fill the soil, about a year later, it can be cut off to form new seedlings.
