Look at the season. Winter temperature is low, plant growth is slow, most flowers are in a state of stagnant growth, generally no fertilization; spring and autumn are in the peak period of flower growth, root, stem, leaf growth, flower bud differentiation, young fruit expansion, all need more Fertilizers should be applied with more topdressing; the temperature in summer is high, the water evaporates quickly, and the growth of flower plants is vigorous. The concentration of topdressing should be small and the number of times can be more. More nitrogen fertilizer can be applied in the seedling stage to promote the rapid and robust growth of seedlings; more phosphate fertilizer can be applied in the gestation bud stage to promote the growth of flowers and seeds; appropriate control of fertilization in the early stage of fruit setting to facilitate fruit setting.
Second, look at the variety. Different varieties of flowers have different requirements for fertilizer, so different fertilizers should be applied. For example, sweet-scented osmanthus and camellia love pig manure and avoid human feces and urine; southern flowers such as rhododendron, camellia, gardenia and other southern flowers avoid alkaline fertilizers; flowers that need to be cut every year need to increase the proportion of phosphorus and potassium fertilizer to facilitate new germination techniques; For leaves-based flowers, nitrogen fertilizer can be applied more heavily; for large-flowered flowers, such as dahlias, chrysanthemums, etc., proper amount of complete fertilizer should be applied during the flowering period to make all the flowers open and beautiful in appearance and colors; For flowers, water supply should be properly controlled during the flowering period, and sufficient complete fertilizers should be applied during the strong fruit period to achieve the desired effect; bulbous flowers, apply more potassium fertilizer to facilitate bulbous roots; fragrant flowers, enter the flowering period, apply more Phosphorus and potash fertilizers can promote strong floral fragrance.
Three look at growth. Especially for potted flowers, fertilization depends on the growth and the fixed amount. Adhere to the principle of "four more, four less, four no", that is, apply more for yellow and thin, apply more before germination, apply more for pregnant buds, and apply more after blooming; apply less for health, apply less for germination, apply less for flowering, and apply less during rainy season ; Do not apply for long-term growth, do not do new planting, do not do it in hot summer, do not do it when dormant. At the same time, pay attention to the "four taboos": one is avoiding concentrated fertilizer, the other is raw fertilizer (the application of organic fertilizer must be fully decomposed), the third is avoiding hot fertilizer (the soil temperature is high at noon in summer, fertilization is easy to damage the root), and the fourth is not sitting on fertilizer When planting flowers, do not put the roots directly on the base fertilizer at the bottom of the pot, but add a layer of soil on the fertilizer before planting the flowers in the pot.
It is worth noting that it is not suitable to fertilize when the temperature is high around noon, and base fertilizer should be applied when changing pots or transplanting flowers.
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