From March to April, i.e. after leaving the house to before the flower bud is colored, in order to make the old leaves turn green and promote the growth of new roots, thin alum fertilizer water can be applied every 10 days; from May to July, i.e. after the flower is withered, diluted alum fertilizer water can be applied every half a month; from August to mid October, during the bud pregnancy period, alum fertilizer water with potassium and scales can be applied every 10 days; after winter near the house, it will be applied. Fertilization should be stopped
1. When applying fertilizer to Rhododendron, it must be noted that thin fertilizer should be applied frequently, and the fertilizer should be used fully, and the fertilizer solution should not be splashed on the branches and leaves.
2. Fertilization should be carried out when the weather is clear and the basin soil is dry, preferably in the evening, when the effect is the best and the safest
3. In the morning of the second day after fertilization, water once, and then use clear water, which is more conducive to the dissolution of fertilizer and better absorption of roots.
