How to fertilize rose planting in spring
Spring returns to the earth, and the rose ushers in its golden growth period. Scientific fertilization not only allows newly planted roses to quickly adapt to the environment, but also reserves sufficient nutrients for flowering throughout the year. Master the three major fertilization rules and let your roses bloom with amazing vitality in spring. 1. The golden rule for basal fertilizer application 1. During the critical period of fertilizer ban in the early stage of planting, newly transplanted roses need to go through 7 days of root-slowing seedling stage. At this time, the root system has not yet restored its harvesting function, and premature fertilization can easily cause fertilizer damage. When planting, you can pre-bury decomposed sheep manure in the soil (add 3-5 grams per liter of soil). Pay attention to the basic fertilizer must be fully mixed with the soil to avoid burning roots. 2. Slow-release fertilizer matching skills After the new leaves are unfurled, embed Aolu 318S Slow-release fertilizer along the edge of the pot (about 5 grams for a 15-cm pot). Pellet fertilizer needs to be more than 3 cm away from the main stem and combined with loosening soil to promote nutrient release. 2. Top dressing management during the growing period 1. The secret to fermentation of organic fertilizers When using soybean fertilizer, fermentation must be carried out 90 days in advance: 500 grams of soybeans are cooked, mixed with EM bacterial liquid, and put into a sealed barrel to produce white mycelium to complete the fermentation. Dilute with water at 1:50 before application, and water along the edge of the pot every two weeks. 2. Accurately proportioned water-soluble fertilizers use 1000 times solution of Huaduo 1 (nitrogen, phosphorus and potassium 20 - 20-20) during the leaf expansion period, and switch Huaduo 2 (10-30-20) after the bud appears. Leaf spraying on sunny days and evening can improve absorption rate, and combined with potassium dihydrogen phosphate (1:1500) can enhance stress resistance. 3. Scientific ratio of nutrient elements The ratio of nitrogen, phosphorus and potassium for spring roses is 3:1:2, and calcium and magnesium elements are also supplemented. Adding 200 grams of bone meal per square meter of soil can prevent blind branches, and applying magnesium sulfate once a month (2 grams/liter of water) can keep the leaves shiny.
Master the "three-look" fertilization principles: adjust the amount of nitrogen fertilizer according to the shade of leaves, increase or decrease the proportion of phosphate fertilizer according to the number of flower buds, and control potassium fertilizer supply according to the hardness of branches. Combined with the "alternate dry and wet" watering method (3cm of surface soil is dried and then watered), the fertilizer utilization rate can be increased by 40%. Regularly check the soil EC value (preferably maintained at 1.2-1.8mS/cm) to keep your roses in optimal growth status throughout spring.