The optimal planting time takes from the end of May through the summer until the first frost. By keeping the planting method rapid development can be achieved. In the first year the tree can reach the height of 2 meters and above and a trunk thickness of 0,05 m.
Soil Preparation, Planting
The Paulownia tree can be planted on poor quality land, in saline, clayey and sandy soils, so it tolerates almost any type of soil well; its deep sinking roots prevent soil erosion. Through its water absorption capacity it can decrease the stagnating groundwater level, thereby restoring the salt content of the soil. Make a 0,6-0,8 m deep hole of approximately 0,4 m diameter. The holes should be banked up with good quality soil that holds moisture well.
278 trees/ha on 6 x 6 m
400 trees/ha on 5 x 5 m
500 trees/ha on 5 x 4 m
If the trees are lumbered at the age of seven, they need to be thinned within 3-5 years after planting. In a 5 x 5 m or 6 x 6 meter placement the thinning is needed in the fifth year at the latest. In the case of a 5 x 10 meters or 6 x 12 meters placement the second lines should simply be taken out maximum 5 years after planting. In case the tree planting is kept up to 12 years, it is worth thinning in the 6-7 year, forming 6 x 12 m, 5 x 10 m and 5 x 8 m grid pattern.
The tree needs to be watered thoroughly on the day of planting, after that as required as long as the roots reach the groundwater level. Generous dose of nitrogen accelerates the growth.
After planting in the spring, cut it back above ground level. The offshoot of the sprouted sapling should be broken or cut out to get the straight trunk.