How to Grow Crabapple Flowers? A Detailed Guide to the Latest Cultivation Methods
The crabapple flower is a plant native to China. It mostly grows in plains and mountains at altitudes of 50 m to 2000 m and can be introduced and cultivated artificially; it is a small deciduous tree. Crabapple likes light, is cold-hardy, dislikes waterlogging, dislikes overly humid air, is relatively drought-tolerant, and is not demanding about soil and water; it grows best in fertile, loose, well-drained sandy loam.
Propagation Methods
Crabapple flowers are commonly propagated by sowing, division and grafting. Sowing can be done in autumn, or the seeds can be stratified in sand and sown in spring; seedlings grow slowly and take 5-6 years to bloom, and they often vary, so they are used only for rootstock production and cross-breeding.
Horticultural cultivars are mostly propagated by grafting, using seedlings of Malus baccata or crabapple as the rootstock; both stem grafting and bud grafting can be used. For stem grafting, cut grafting and cleft grafting can be used, while for bud grafting the “T”-shaped method is mostly used. Graft before bud break in spring or in autumn from July to September. Propagate by division before bud break in spring or after leaf fall in autumn and winter. Layer and root-cutt in spring. Before spring sowing, the seeds must undergo 30-100 days of cold stratification to promote germination. After planting, the soil should be kept loose and fertile, and every autumn pond silt or fertile soil can be mounded around the root zone. Prune once in spring, cutting out dead and weak branches to keep the tree shape open and airy and to allow ventilation and light penetration.
It is generally planted in the ground, but it can also be made into bonsai and grown in pots. The best planting time is before bud break in early spring or after leaf fall in early winter. When the seedlings leave the nursery, keeping the root system intact is one of the keys to successful planting.
Cultivation Techniques
Generally, large seedlings for planting should be kept with a soil ball, while small seedlings should retain some native soil depending on the situation. After planting, care and management should be strengthened, the soil should be kept loose and fertile, and every autumn and winter a batch of pond silt or fertile soil can be replaced and mounded around the root zone.
Prune once after leaf fall and before bud break in early spring, cutting out dead and weak branches and diseased or pest-infested branches to keep the crown open and airy and to allow ventilation and light penetration. To promote vigorous flowering, the water sprouts should be cut back to reduce the nutrient consumption of sprouting and allow the remaining axillary buds to obtain more nutrients and form more flowering and fruiting branches. Fruiting branches and intermediate branches do not need pruning. During the growing period, if the tips are pinched in time to limit vegetative growth early, the effect will be even more noticeable. This control is even more necessary for potted bonsai.
In early July, move potted crabapple trees to a cool, rain-sheltered place to lower the temperature, reduce light and control watering. Watering must be gradually reduced until the leaves turn yellow and fall off on their own, so as to promote dormancy. After that, continue watering a small amount, just enough to maintain life and prevent new buds from sprouting. After a 35-45 day dormancy period, place the plant in full light, water thoroughly and apply liquid fertilizer to wake it up and make it sprout new buds (leaf buds and flower buds grow together). After another 5-7 days, the bright and eye-catching crabapple flowers can be seen.
In addition, taking advantage of its buds' sensitivity to temperature, the method of heating to force flowering can be used in deep winter. Move the potted crabapple bonsai to a sunny spot in a greenhouse, water thoroughly, apply liquid fertilizer, and afterward spray the branches and trunk appropriately with water every day, keeping the room temperature at 20-25°C. After 30-40 days, it can also bloom, and can be used for display and viewing during New Year's Day or the Spring Festival. Large-cut flowers grown in water can also be forced in a greenhouse. They can be grown in water in batches throughout the winter and used as they bloom.