Ginkgo propagation method

Seed propagation of Ginkgo

Ginkgo seeds are harvested in autumn, the outer seed coat is removed and dried, and can be sown in winter of the same year or in spring of the following year. When sowing, place the seed embryo horizontally in the sowing furrow, cover the soil to a depth of about 3-4 cm and compact it lightly. It is best to add a layer of plastic film after covering the soil to help maintain temperature and humidity. When the embryo emerges from the soil, ventilate appropriately and gradually remove the film. After the leaves fall, they can be transplanted.

Cutting propagation of Ginkgo

Cutting propagation is divided into two types: old branch cuttings and soft branch cuttings.

Cuttings from old branches are suitable for large-scale greening and seedling cultivation. Generally, one- or two-year-old sturdy branches are cut from the mother plant in March and April and cut into cuttings about 10-15 cm long each. After cuttings, water them thoroughly and keep the soil moist. It usually takes about 40 days for the roots to take root. Transplantation can be carried out in the spring of the following year.

Softwood cuttings are generally carried out in July. The cuttings are chosen by cutting semi-lignified branches grown that year, cutting them into cuttings with 2-3 buds per node, then soaking them in rooting powder, and finally cutting them. After cutting, keep the soil moist, provide appropriate ventilation and shade, and transplant them after they have taken root.

Grafting propagation of Ginkgo

It is usually carried out in spring, using methods such as subcutaneous grafting, bark grafting or cut grafting. It is appropriate to choose short branches with about 4 short branches on 3-year-old or 4-year-old branches as scion, and generally 3-5 branches are grafted per plant. Generally, it will start to bear fruit 5-8 years after grafting.

Tillering propagation of Ginkgo

Tillering propagation can be carried out in two ways: cutting off the original root tillers and digging trenches to cut off the roots to promote new tillers. Seedlings propagated by tillering can be planted directly.

The former is generally carried out in July and August. The root sucker stem is first ring-barked and then soil is added. New roots will grow from the ring-barked area after about a month, and the plant can be cut off from the mother plant and planted directly in the spring of the following year.

Digging trenches to cut off roots and promote the growth of new tillers is usually done in autumn. Dig a circular trench about 50 cm deep and wide near the big ginkgo tree, cut off the lateral roots, and then fill with soil. After about a year, the tree can be cut off to form new seedlings.