1. Growth period: Rhododendron likes to apply thin fertilizer frequently in the production period, and the diluted decomposed cake fertilizer is the best, usually once every 7- 10 days, and enters the second growth period after autumn. More phosphorus and potassium fertilizers should be applied during flower bud differentiation and bud pregnancy, and water should be poured the next day after fertilization.
2. Flowering period: Phosphate fertilizer should be applied one month before flowering, and the fertilizer concentration can be appropriately increased after flowering.
3. After flowering: apply nitrogen fertilizer to rhododendron 2-3 times every 10 day/time to promote the growth of branches and leaves. After August, the lignification of new branches and leaves is the key period for azaleas to bud, and the fertilizer mainly composed of phosphorus and combined with nitrogen and phosphorus should be applied 2-3 times every half month 1 time. At this time, if there is no fertilization, or lack of phosphate fertilizer, or use fertilizers with high nitrogen content such as soybean milk, Rhododendron will only grow sterile buds.
Extended data:
Precautions:
1, Rhododendron is a shade-loving plant, and direct sunlight is not good for its growth, so it is best to plant it in a cool place.
2. I like acid soil with good drainage, which is loose and fertile and rich in humus. Suitable for acid sandy loam, not for stagnant water.
3. Early spring or late autumn is suitable for planting, and the temperature and light are suitable.
Rhododendron likes the environment with high air humidity. You can spray water on azalea leaves, or spray the surrounding air to keep the surrounding air moist.
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