Catalpa tree has a wide crown and beautiful flowers in spring. It can be used as greening material for street trees, shade trees, villages and houses.
The ancients planted mulberry trees and catalpa trees in front of and behind their houses.
Catalpa bungeana is a arbor with a height of 10 ~ 20m.
Crown spread, bark grayish brown, longitudinally split.
Ye Guang is ovoid or nearly round, 10 ~ 30 cm long, usually 3 ~ 5-lobed, hairy, with purple spots in the axils of abaxial veins.
Panicle terminal, long10 ~ 20cm, calyx green or purple, corolla pale yellow, with yellow and purple stripes inside, flowering in May.
The capsule is slender like chopsticks, 20 ~ 30 cm long, and the seeds are hairy.
Catalpa likes light, slightly tolerant to shade, suitable for growing in temperate regions, quite cold-resistant, and does not grow well in warm and hot climate.
I like deep, fertile and moist soil, but I don't like drought and barren, and I like mild salinity.
Strong resistance to chlorine, sulfur dioxide and smoke.
Catalpa bungeana usually adopts natural happiness, and attention should be paid to keeping it dry at seedling stage.
In order to cultivate a straight and stout trunk, the trunk can be cut off from the ground in the spring of planting seedlings in the second year to make it sprout new branches again.
After the seedlings leave the nursery to dry, three lateral buds at the top of the seedlings are selected as the main branches for cultivation, and other branches are cut off.
These three main branches should be staggered at appropriate intervals and cannot be rotated. In the future, the crown of the tree will be expanded by these three oblique branches of the foreign minister.
When planting in the second year, the three main branches should be cut short, leaving about 40 cm, and at the same time, 2 ~ 3 lateral branches on the main branches should be kept, which are scattered and occupy a certain space. Horizontal branches should be from bottom to top and maintain a certain subordinate relationship.
In the future, only general pruning will be done to the trees, and dry dead branches, pest branches and upright branches will be cut off.
The crown of the tree extends too far, the bare lower part should be retracted in time, and the weak branches should be renewed and rejuvenated.