Principle of fertilization: apply thin fertilizer frequently.
The basic fertilizer can be 4 parts of perlite, 6 parts of peat soil and a small amount of basic fertilizer, or 3 parts of river sand, 7 parts of leaf soil and a small amount of basic fertilizer. In this way, we don't need to apply fertilizer before planting.
Apply fertilizer once or twice a month in the growing season of watercress.
In September, to stop the application of nitrogen fertilizer to Douban green, you can increase the amount of potash fertilizer, so that you can prepare for Douban green winter.
When the temperature is above 18 degrees in the room, it is necessary to reduce the amount of fertilizer, but when the temperature is below 18 degrees and 30 degrees, the fertilizer can be suspended. If you want to apply fertilizer, you must reduce the amount of fertilizer, increase the times, mainly light fertilizer.
In fertilization, its fertilizer can not use a single nitrogen fertilizer, which will make the bean green.
Do not splash fertilizer on the surface of the plant during fertilization. Spray water on the surface of the plant after fertilization.
Douban green is not suitable to use concentrated fertilizer and raw fertilizer for fertilization, otherwise it is easy to cause damage to plants.
When applying fertilizer to Douban green, you can also spray liquid fertilizer on its surface, and the effect is good.
