Under the premise of meeting the demand of nitrogen fertilizer, ornamental flowers should pay attention to the proportion of applying phosphorus and potassium fertilizer; ornamental flowers should apply potassium fertilizer on the basis of sufficient nitrogen fertilizer; ornamental flowers should mainly apply nitrogen fertilizer, with phosphorus and potassium fertilizer, trace elements and rare earth fertilizer.
A large amount of nitrogen fertilizer is needed in the fast-growing stage of the seedlings of perennial flowers. At the same time, phosphorus and potassium fertilizer should be supplemented. Generally speaking, the growth period of flowers apply nitrogen fertilizer, do not need to apply fertilizer when flowering, apply phosphorus and potassium fertilizer before flowering, topdressing after flowering.
When Rhododendron is used as a pot culture, the basal fertilizer should be applied before planting, and the P-K fertilizer should be applied before flowering to promote the formation and flowering of flower buds; the N-based fertilizer should be applied after the Rhododendron is withered to promote the growth of branches and leaves, and the P-based fertilizer should be applied after the new branches and leaves are lignified; the N-K fertilizer should not be applied during the winter dormancy period, and the P-based fertilizer should be applied before flowering. Can make the flower of the plant big and colorful.
In spring and autumn, the basic fertilizer can be applied, and the phosphorus fertilizer can be applied properly. In spring, the nitrogen fertilizer can be applied to flowers when they sprout and draw leaves, which can guarantee the nutrition of plants and make them grow vigorously. In summer, many flower buds of woody flowers begin to differentiate, at this time, the supply of phosphorus and potassium fertilizer should be guaranteed, and the amount of phosphorus fertilizer should be controlled.
