In the summer, most of the flowers are relatively poor because of the high temperature. Flowers that are not high in temperature, such as dwarf red, petunia, and clivia, grow extremely slowly and require less fertilizer. At this time, fertilization should be stopped. If the cooling conditions are good, the flowers can be fertilized when they can grow normally. The flowers in semi-dormancy such as roses and cyclamen should stop fertilizing, and should start fertilizing after the temperature drops and resumes growth. For some heat-resistant flowers such as zinnia, periwinkle, cockscomb, sunflower, etc., summer is the peak season for their growth and flowering. The fertilizer should be used normally. However, due to the high temperature during the daytime in summer, fertilization should be selected in the early morning or early evening. The concentration of fertilization should also be controlled to prevent root burning. After applying the fertilizer, the leaves of the flowers shall be washed immediately with clean water to prevent splashing on the leaf surface of the fertilizer. Aquatic flowers such as water lilies and bowl lotus can also be fertilized normally in the summer. The root soil can be filled with decomposed fertilizer, and there is no phenomenon of burning roots and burning leaves.
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