First, the temperature should be taken into account for top dressing. The suitable temperature of topdressing is between 15-30 degrees. If the temperature is too high or too low, the risk of topdressing will be increased and fertilizer damage will be easily caused.
Second, top dressing depends on the growth form of plants. It's better to apply nitrogen fertilizer in the growth period of plants, mainly P and K fertilizer in the bud period, fruiting period and after anthesis. Do not apply fertilizer too early for the newly transplanted plants, or it will affect the recovery of slow seedlings.
Third, time should be considered for top dressing. Topdressing should not be carried out at noon in summer and autumn. When topdressing foliar fertilizer, it is better to do it in the afternoon without direct sunlight or in the evening, otherwise it is easy to burn the foliar.
One is the general method of topdressing. When topdressing potted plants, dig the topsoil at the edge of the flowering pot directly and put the fertilizer in the back cover for watering.
Second, the water-soluble fertilizer and water mix after dissolution, directly apply foliar fertilizer or water can be.
The principle of top dressing is "thin fertilizer should be applied frequently". If you don't know the proper dosage, try to adjust the concentration as low as possible. You should often top dressing, but it's better to interval one week or more
One is that the plants in the flowering stage basically do not need topdressing, but the perennial grass and flowers like dwarf cattle, geranium, carnation and sunflower can also be topdressing in the flowering stage.
Second, the requirement of the ground plant to the temperature is not so strict, and the topdressing demand can be determined according to the plant growth.
