What issues should be paid attention to when fertilizing potted flowers?

(1) Fertilize according to different flowers and trees and different growth periods. For example, when chrysanthemums are forming flower buds, the amount and concentration of fertilizer should be gradually increased. Gardenia, rhododendron, camellia, jasmine and other flowers and trees that like acidic soil cannot be treated with alkaline fertilizers such as ammonia and sodium nitrate. Bulb flowers and flowers and trees that need to be pruned every year should be fertilized with more phosphorus and potassium fertilizers. Overwintering fertilizer should be applied in the first half of the frost to improve the plant's cold resistance; germination fertilizer should be applied before germination in early spring to make the buds grow large and sprout quickly; pregnancy fertilizer should be applied when the spring shoots are about to mature to promote the differentiation of flower buds and full buds. ; Apply thin nutrient fertilizer after flowering to restore tree vigor and promote re-flowering or fruiting. During the flowering period and the early stage of fruit setting, fertilizer and water must be controlled, otherwise flowers and fruits will fall easily. The seedlings grow rapidly, so apply more nitrogen and potassium fertilizers. Before flowering and during budding, apply more phosphorus fertilizer.

(2) Loosen the soil before applying fertilizer, and be careful not to let fertilizer water fall on the leaves and buds. Acidic fertilizers such as human waste, superphosphate, and ammonium carbonate cannot be mixed with alkaline fertilizers such as plant ash and ammonia. Use acidic fertilizers for alkaline potting soil, and alkaline fertilizers for acidic potting soil. Do not fertilize alone. Applying nitrogen fertilizer in conjunction with phosphorus and potassium fertilizers can improve fertilizer efficiency. Applying inorganic fertilizers in conjunction with organic fertilizers can extend fertilizer efficiency, prevent pot soil from compacting, and improve ventilation, water seepage, water retention, and fertilizer retention.

(3) When fertilizing on the balcony, pay attention to environmental hygiene and be careful not to dirty the clothes hanging on the balcony downstairs.