How to identify and control flower diseases? Fertilizing according to the symptoms is key

1. Urea and ammonium sulfate are quick-acting nitrogen fertilizers with strong fertility and fast results, but their effect does not last long. Urea is slightly alkaline and is suitable for flowers in the north; ammonium sulfate turns acidic after being applied to the soil and is suitable for flowers in the south. When using it, it is best to dilute it with 1000—1500 times water and then water the plants with it. Do not broadcast it in the pot, otherwise the flowers and trees will be burned to death because too much is applied.

2. Calcium superphosphate is a quick-acting phosphorus fertilizer with a slightly acidic reaction and a relatively mild fertilizing effect. When using it, it can be mixed with potting soil at 1:100, or scattered into flower beds and flower borders before planting and then turned into the soil as a base fertilizer. For topdressing, first add 30—100 times water, soak for one day and night, then take the clear liquid on top and water the plants with it.

3. Potassium dihydrogen phosphate is an advanced quick-acting phosphorus and potassium fertilizer. It is odorless and tasteless and has a remarkable fertilizing effect. It has a significant effect on the growth of ornamental flowers such as chrysanthemums, Chinese roses, dahlias, and kumquats. When applying it, it should be dissolved in 500—1000 times water for dilution.

4. Boric acid and boron have a significant effect on promoting flower bud differentiation, fostering flower buds, and preventing fruit drop. A 2000—2500 times dilution of boric acid solution can be sprayed on the flower plants several times before and after bud formation.

5. Ferrous sulfate When growing southern acid-soil flowers in the north, the leaves often turn yellow and fall off. To prevent leaf yellowing, a 500 times diluted ferrous sulfate solution can be watered on regularly, once every 15—20 days.