How many times a year do apple trees fertilize? What fertilizer should be applied to apple trees in spring? what chemical fertilizer is best for apple trees?

How many times a year do apple trees fertilize? In fact, it is to apply fertilizer for four times, mainly that the fruit of apple trees is big and good, fertilizer for protecting flowers and fruits in spring, fertilizer for promoting flowers and expanding fruits in summer, and fertilizer for promoting roots and strong trees in autumn.

The first topdressing should be before flowering, with an appropriate amount of available fertilizer.

The second time is topdressing fertilizer, which should be carried out immediately after falling flowers, in order to reduce physiological fruit drop, promote shoot growth mainly by applying available nitrogen fertilizer, and apply 1 kg urea per adult tree.

The third time is topdressing during fruit expansion and flower bud differentiation, applying appropriate amount of nitrogen, phosphorus, potassium fertilizer and various trace elements calcium, magnesium, silicon and so on.

The fourth time was topdressing during the stop-growing period of autumn shoots, with 50 kg of human feces and urine, 1 kg of calcium superphosphate and 0.5 kg of potassium sulfate per adult tree.

What kind of fertilizer do apple trees apply in spring? The fertilization of apple trees in spring should be mainly nitrogen fertilizer, combined with phosphorus and potassium fertilizer, auxiliary medium elements calcium, magnesium and trace elements zinc, iron, boron and so on.

What kind of fertilizer is the best for apple trees? When applying nitrogen, phosphorus and potassium fertilizer to apple trees, it is best to apply compound fertilizer properly, about 1 kilogram per tree; there can be more big trees with more fruit.