After azalea pruning, 0. 1% ~ 0.3% urea aqueous solution should be sprayed once every 7 ~ 10 days for 3 ~ 4 consecutive times to promote the growth of new shoots. Combined with watering, thin decomposed liquid fertilizer can be applied 2 ~ 4 times a month, and a little calcium superphosphate and potassium sulfate can be added to the decomposed pancake fertilizer water, and "alum fertilizer water" should be applied in time in northern areas.
When the basin soil is too wet, it is not suitable for fertilization, and it is forbidden to apply raw fertilizer and concentrated fertilizer. Spraying 0. 1% ~ 0.2% potassium dihydrogen phosphate aqueous solution on the leaves in bud stage, watering or fertilizing the roots, then adding it into fertilizer water and spraying (watering) once every 7 ~ 10 days, and spraying (watering) continuously for 3 ~ 4 times.
To sum up, after the azalea is pruned, it is necessary to keep the basin soil moist and not waterlogged, and to fully illuminate it. The basin soil should be kept dry and moist in bud stage and full bloom stage. After flowering every year, turn over the pots and change the soil, replace two-thirds to three-quarters of the old soil, cut off the dead roots, rotten roots, pest roots and short roots, and apply some fermented animal bones, hoof horns and cake fertilizer to the bottom of the pot.
Through our introduction, I believe everyone has a deeper understanding of what fertilizer to apply after pruning azaleas and what fertilizer to spray after pruning azaleas leaves.