1, light and temperature: it can overwinter in the open field. It grows well under the conditions of sufficient sunlight and temperature of 20-25℃. When the temperature is below -25℃ in winter, freezing injury will occur and even lead to death.

2. Water fertilization: before planting, apply sufficient base fertilizer, generally apply decomposed manure, dig deep holes in trees, apply 2-3 times of phosphorus and potassium fertilizer (potassium dihydrogen phosphate) at flowering stage, and apply 65,438+0 times of overwintering fertilizer at the end of autumn. It is best to use decomposed manure or manure, stop fertilization in winter and reduce the amount of watering.

3, plastic pruning: spring is better. In early spring, dry and dead branches, over-dense branches, weak branches and aging branches are cut off before germination, so that plants are beautiful in appearance, full of flowers and vigorous in growth.