15 cm.

The growth rate of crabapple trees is relatively fast. They can grow about 1.5cm in height in a year. If they are properly maintained, the plants will grow even higher. Most crabapple trees can grow to 1 meter. At above heights, some wild crabapple trees can grow to 5 meters high or even higher. If the crabapple tree wants to grow quickly, it is also important to prune it properly. It is usually pruned after the leaves fall and before budding in early spring. It mainly removes dead and weak branches, diseased and insect-infested branches.

Extended information:

Notes:

Best breeding time: The best breeding time for crabapple trees is in spring.

Best growing soil: Begonia trees are suitable for loose, fertile, sandy soil with deep soil and good drainage.

Growth humidity requirements: Begonia trees should pay attention to shading in summer to prevent heatstroke and ensure that they rely on air humidity.

Optimal growth temperature: The suitable temperature for the growth of crabapple trees is 15 to 28°C.

Optimum light for growth: Begonia trees like sunlight and are intolerant of shade. They love a warm and humid environment and are suitable for growing in sunny and leeward places.

Begonia is the general name and common name for various plants of the genus Malus and several plants of the genus Chaenomeles. Representative plants, crabapple (scientific name: Malus spectabilis) and papaya (scientific name: Chaenomeles sinensis), are shrubs or small trees of the Rosaceae family. They are famous ornamental tree species in China and are commonly cultivated in various places. Horticultural varieties include pink double-flowered ones and white double-flowered ones.

Begonias are mostly ornamental flowers and trees used for urban greening and beautification (although there are many varieties whose fruits have high edible value). Many of them are famous ornamental plants, such as Begonia xifu, Begonia cascading, Begonia truncatula and Begonia quince, commonly known as "Four Begonias", which are important temperate zone flowering trees. Distributed in Shandong, Shaanxi, Hubei, Jiangxi, Anhui, Jiangsu, Zhejiang, Guangdong, and Guangxi, China.

Deciduous shrubs or small trees, up to 7 meters high, without thorns; branchlets cylindrical, purple-red, covered with light yellow hairs when young; bark peeling off in flakes, with obvious trailing marks. The leaves are elliptical or elliptical-oblong, 5-9 cm long, 3-6 cm wide, with an acute apex, a wedge-shaped or nearly rounded base, an awn-like finely serrated edge, glandular ends, and a hairless surface. , sparsely pubescent along the veins when young, densely covered with yellow-white hairs on the back when young; petioles are stout, 1-1.5 cm long, covered with yellow-white hairs, with rod-like glands on both sides above; stipules are membranous, oval-lanceolate. Shape, 7-15 mm long, apex acuminate, margin toothed, pubescent along the veins. The flowers are solitary at the ends of short branches, 2.5-3 cm in diameter; the pedicels are thick and short, 5-10 mm long, hairless; the outside of the calyx tube is hairless; the calyx lobes are triangular-lanceolate, about 7 mm long, and the apex is long and acuminate. , with sparse glandular teeth on the edge, hairless or sparsely pubescent on the outside, densely covered with light brown hairs on the inside, longer than the calyx tube, reflexed when fruiting; petals obovate, light red; stamens about 5 mm long; style about 6 mm long , pubescent. Pear fruit is oblong in shape, 10-15 cm long, dark yellow, shiny, woody flesh, slightly sour, astringent, aromatic, with short stem. The flowering period is April and the fruiting period is September-October.