Topdressing conditions

First, the temperature should be considered for topdressing. The suitable temperature for topdressing is between 15-30 degrees. Too high or too low temperature will increase the risk of Topdressing and be prone to fertilizer damage

Second, topdressing depends on the growth form of plants. Nitrogen fertilizer should be applied during the growth period of plants, and phosphorus and potassium fertilizer should be the main fertilizer at the flower bud stage, fruiting stage and after anthesis; The newly transplanted plants should not be fertilized too early, otherwise it will affect the slow seedling recovery

Third, time should be considered for topdressing. Topdressing should not be carried out at noon in summer and autumn. When topdressing foliar fertilizer, it is better to have no direct sunlight in the afternoon or in the evening, otherwise it is easy to burn the foliar surface

Method of topdressing

The first is the general method of topdressing. When topdressing potted plants, directly dig the topsoil at the edge of the flowering pot, put the fertilizer into the soil and water it

Second, after the water-soluble fertilizer and water are mixed and dissolved, apply leaf fertilizer or water directly

Principle of topdressing

The principle of topdressing is "thin fertilizer and frequent application". When the appropriate dosage is not mastered, the concentration shall be reduced as far as possible. Topdressing shall be carried out frequently, but it is best to interval for one week or more

Special case of topdressing

First, plants in full bloom basically do not need topdressing, but perennial flowering grass and flowers such as dwarf cattle, geranium, carnation and sunflower can also be topdressed in full bloom

Second, the requirements of ground plants for temperature are not so strict, and the topdressing demand can be determined according to the plant growth< span>