Planting and seedling raising of Paulownia

Paulownia planting and seedling raising are generally carried out from February to March. Seeds need to be germinated and disinfected before sowing. Soak the seeds in warm water at about 35-40 ℃ for about half an hour, cool them and then put them in warm water at about 15-25 ℃ for 12-14 hours. After taking out the seeds, wash them with water at about 35 ℃ for 1-2 times a day without turning. Generally, seeds can be sown after germination in 3-5 days. Or use wet sand to promote germination, which takes about 10-15 days. Water regularly to keep the relative humidity between 90-95%. The seeding and seedling raising adopts the drill sowing method. After sowing, it needs to burn the soil with fine fire or cover a thin layer of grain ash, compact it properly, and finally cover it with straw

Root burying and seedling raising of Paulownia

Roots can be collected from after falling leaves to before germination. It is usually carried out from the middle of February to the first ten days of March. The seedlings for 1 or 2 years are collected and left with seed roots after leaving the nursery, or the lateral roots with a thickness of 2-3cm are selected from the strong trees, and then cut into root segments with a length of about 15-20cm. The large head is cut flat, and the small head is cut obliquely and dried for 2-3 days. The root can be buried directly or obliquely, but it is better to bury directly. The upper end is not exposed or slightly exposed to the ground to prevent reverse burial. The reasonable spacing shall be controlled. The suitable plant spacing is about 0.8-1m and the row spacing is about 1m. In addition, you can also select about 20cm thick annual branches with strong growth, and then cut cuttings with a growth of about 20cm for cutting seedling raising< span>