How to propagate the Radermachera sinica? Introduction to propagation methods for Radermachera sinica

The scientific name of Radermachera sinica is Radermachera sinica. It likes high temperatures, high humidity and plenty of sunlight, tolerates high temperatures, fears cold, prefers moisture and dislikes dryness. For cultivation, use loose, fertile, well-drained loam and sandy loam rich in organic matter. The flowering period is from May to September, and the fruiting period is from October to December. Now let us take a look at the propagation methods of Radermachera sinica.

Seed propagation

Around the end of December, when the capsules are nearly ready to split and the seeds are fully mature, harvest the long strip-shaped capsules. After drying, shake out the winged seeds, rub them and winnow away the membranous wing fragments, then store them dry until sowing the following spring. They can also be soaked for 2 to 3 hours and then mixed with moist sand, spread thinly in a large plastic basin inside a shed, keeping the seeds and sand moist, and checked frequently to prevent mildew. After the seeds germinate, sow them in the ground. For dry-stored seeds, between March and April, first soak them for 3 to 4 hours, remove them and spread them out briefly to air-dry, then mix them with sandy soil and scatter them on a prepared seedbed, cover lightly with a thin layer of soil, and cover with plastic film to retain moisture. After the seeds sprout, remove the film and set up a light-shade shed for shading. When they grow 2 to 3 true leaves, transplant them with a soil ball at wider spacing. Alternatively, when they grow 4 to 5 large leaves, pot them or grow them in bags. Strengthen water and fertilizer management, and they can be sold as commercial seedlings in the same year.

Cutting propagation

Between March and April, when the ambient temperature reaches about 15°C, cut 1- to 2-year-old lignified branches, about 15 cm to 20 cm long, remove all leaves, with the lower cut preferably located 0.5 cm below a node, and insert them into a sandy loam seedbed. The depth of insertion is about 1/3 to 1/2 of the cutting length. During the period when the lower cut is healing and rooting, spray water to keep the seedbed moist. After a well-developed root system has grown, transplant them with a soil ball into pots. It is best to plant 2 to 3 together, so they can take shape earlier and be sold.

Layering propagation

Between March and April, on 2-year-old vigorous branches or stems, carry out ring barking below a node. The width of the bark removal is generally 2 to 3 times the diameter of the layered stem. Below the ring-bark cut, tie a piece of plastic film measuring 15 cm x 20 cm. Use clean moist peat soil or sandy loam to press a soil ball with a diameter of 8 cm to 10 cm around the ring-bark site. Then wrap the soil ball with plastic film, leave an opening at the top for water, and tie it against a thick main trunk to prevent it from drooping and breaking in the wind. By late autumn, after the ring-bark site has grown a fairly well-developed root system, cut it away from the mother plant and pot it separately.

That is the introduction to the propagation methods of Radermachera sinica. I hope it is helpful for your cultivation of Radermachera sinica.