What Fertilizer to Use for Rose Plants
Rose plants, as the classic plants for courtyard beautification, have their flowering quality and plant health directly affected by fertilization management. Proper fertilization can produce beautiful and fresh flowers, while incorrect operations may lead to fertilizer damage or even plant death. This article will systematically analyze the full-cycle fertilization strategy for rose plants and provide emergency solutions for fertilizer damage.
Comprehensive Guide to Scientific Fertilization
Basal Fertilization Norms
When planting in spring, lay a 5cm thick layer of decomposed sheep manure or earthworm manure at the bottom of the planting hole and mix bone meal to supplement calcium. Avoid using raw, unfermented fertilizer, as it can cause root burn. After 15 days of planting new seedlings, bury slow-release granular fertilizer shallowly around the pot edge, continuously releasing nutrients for 60 days.
Flowering Period Nutrition Management
In the early bud formation stage, use a golden ratio (N-P-K = 1:2:1) water-soluble fertilizer, applying it once every 10 days. Combine with foliar application of 0.1% potassium dihydrogen phosphate solution to increase flower bud density by 40%. After the flowers fade, promptly remove the spent flowers and bury them with fermented rapeseed cake fertilizer to replenish consumed nutrients.
Overwintering Care Tips
Apply high-phosphorus and high-calcium fertilizer (such as superphosphate) 20 days before frost, with 50g per plant applied in a circular trench. Combine with the application of wood ash to supplement potassium and adjust soil pH, significantly increasing the plant's cold resistance.
Emergency Treatment for Fertilizer Damage
Mild Fertilizer Damage Treatment
If the leaf edges turn brown, immediately flood with three times the volume of potting soil with clean water, divided into three intervals of 2 hours. After rinsing, loosen the soil to increase aeration, remove damaged leaves, and pause fertilization for 15 days.
Severe Fertilizer Damage Treatment
When root blackening and rotting occur, a complete soil change is needed. Retain 1/3 of the protective soil, cut off the dead roots, and soak in carbendazim. The new soil should be mixed according to the ratio of peat:vermiculite:perlite = 3:1:1, ensuring good drainage and aeration.
Advanced Fertilization Techniques
Precise Fertilization Method
Use a radial trenching method, digging a 5cm deep circular trench 15cm away from the main stem. Liquid fertilizer concentration should be controlled between 800-1000 times, and solid fertilizer should be thoroughly mixed with the topsoil to avoid concentration.
Homemade Organic Fertilizer
Compost fish innards, soybean dregs, and leaves in a ratio of 3:2:5, and add EM bacteria to accelerate fermentation. The humus formed after 60 days is rich in amino acids and trace elements, making it an excellent nutrient for roses.
Scientific fertilization should follow the principle of 'light and frequent application', combined with regular soil testing to adjust the plan. Mastering the logic of 'observe-diagnose-treat' can not only cultivate stunning rose bushes but also effectively avoid the risk of fertilizer damage. It is recommended to establish a fertilization log, recording the type and time of each fertilizer application, to create a personalized care plan.