Fertilization should vary according to climate

It is not suitable to apply fertilizer in cloudy and rainy weather, because the humidity in the air is high, and the water is not easily evaporated by the stomata, it is not easy for the root to absorb fertilizer. Do not apply fertilizer when the temperature is higher than 30 degrees Celsius, especially foliar fertilization, because the temperature is high, the water evaporates quickly, the concentration of residual fertilizer increases, and it is easy to cause fertilizer injury. No fertilizer is applied when the temperature is below 15 degrees Celsius, because when the temperature is low, the orchid plant is semi-dormant and does not absorb fertilizer. Therefore, fertilization is limited to sunlight, suitable temperature and exuberant photosynthesis.

Fertilization should vary according to the different periods of vegetative growth and reproductive growth of Lanhui:

For new buds and seedlings, before the bulb grows to semi-mature, most of the nutrients made by photosynthesis are used for plant growth, but less storage, which is a vegetative growth period. during this period, the fertilizer applied is slightly more nitrogen fertilizer and less phosphorus and potassium fertilizer. For example, the application of Huabao should be based on the application of Huabao No. 5 (N 30-P 10-K 10) and Huabao No. 2 (N 20-P 20-K 20) to make the plant grow. The vegetative growth period is followed by the reproductive period. The class and protein made by photosynthesis are stored in the bulbs and leaves in preparation for flowering or new bud growth. During this period, more phosphorus and potassium fertilizer should be used to increase the production of nutrients such as orchid plants and proteins. Huabao No. 3 (N 10-P 20-K 30) should be used in order to make the corm full and mature. Huabao No. 4 (nitrogen 25 murine-phosphorus 5murine-potassium 20) was used to promote germination or flowering after the bulb matured. (Zhang Fengrong)