What fertilizer works well when applied before the plum tree blooms?

Before the plum tree blooms, apply 25 kg each of ammonium bicarbonate and potassium dihydrogen phosphate per mu to encourage the plum to bloom and set more fruit. From the young fruit stage to the ripening stage, apply 25 kg each of urea, diammonium phosphate and potassium sulfate per mu. After the fruit is harvested, apply 50 kg of urea per mu. In September, apply 3000 kg of high-quality coarse fertilizer, 30 kg of diammonium phosphate, 30 kg of potassium sulfate and 30 kg of urea per mu.

1. How do you prune a plum tree?

Generally 3-5 times. The first time is after buds break in spring, mainly to remove buds growing in improper positions and the weaker bud of paired buds, reducing useless branches. The second time is after the flowers fall, thinning out overly dense branches and controlling competing branches. The third time is after the pit hardens, cutting back vigorously growing branches. The fourth time is in early to late autumn, cutting back or thinning out excess secondary shoots and pinching the tips of long fruiting branches.

2. How do you protect a plum tree from the cold?

When no freezing damage occurs in winter, it is generally not overwintered indoors; let it overwinter and go dormant naturally outdoors. If freezing damage occurs, choose a clear day to water thoroughly once before the soil freezes, and after the water soaks in, wrap the entire container with straw bags and tie them tightly with rope, or dig a trench in a sheltered, sunny spot and bury it.