Paulownia has straight trunk, wide crown, large leaves and dense flowers. It is suitable for street trees, shade trees and landscape trees, and is also a good material for village greening.
Paulownia is a deciduous tree with a height of 27 meters, a straight trunk and a wide oval or round crown.
Bark is grayish brown and shallow longitudinally.
Branchlets are stout, hairy at first, and then gradually fall off, yellow-green.
The leaves are oval, with a length of10 ~15cm and a width of 6 ~15cm, with an acuminate apex, whole margin, sparse, heart-shaped base, hairless top and white stellate villi at the bottom.
The flower bud is obovate, the calyx is obconical, bell-shaped, and the shallow crack is about 1/4 ~ 1/3 of the length of the calyx. The corolla is funnel-shaped, milky white to purplish, with purple spots and yellow stripes inside. The flowering period is from March to April.
The capsule is oval, 6 ~ 1 1 cm long, and the fruiting period is 9 ~ 10 months.
Paulownia likes warm climate and has poor cold tolerance, especially at seedling stage.
Like light, a little tolerant of shadows.
The adaptability to sticky and barren soil is stronger than other plant species.
Transplant-resistant, it is the species with the strongest resistance to witches' broom in this genus.
Paulownia has strong germination and branching ability.
Rapid growth, substantial growth.
It is a pseudo-branched branch, but its terminal bud often becomes a joint branch after flowering, and even a few are uniaxial branches.
Paulownia has strong dryness, and its shaping method can be central leadership or multi-leadership.
Mainly let nature take its course, and there is no need to air-dry it deliberately. The plastic belt is generally 3 ~ 3.5 meters.
Because there are many branches, as long as the strong side branches less than the height of the plastic belt and the excessive parts of the opposite branches are thinned out year by year during the culture process.
Because the healing ability of paulownia is weak, it is not advisable to prune more during plastic surgery, especially pay attention to the amount of pruning at one time.
The maintenance and pruning of paulownia is generally limited to sorting out miscellaneous branches. Usually, we should pay attention to pruning dead branches, pests and diseases, inward branches, overlapping branches, cross branches, too long branches and too dense twigs.
You can also combine shaping and increase the number of branches with a few shortcuts.
Its flower bud differentiation is easy, and the pruning time does not need to be restricted by flower factors. Usually pruned before flowering in late winter and early spring. If you have entered the mature stage, just pay attention to keeping the terminal flower buds.