How to prune rhododendrons after blooming
As a traditional and famous flower in our country, rhododendron is favored by gardening enthusiasts for its gorgeous flower appearance. However, many flower lovers often fall into maintenance misunderstandings after the rhododendrons end, resulting in poor plant growth and even death. Mastering scientific post-flowering pruning and watering techniques is the key to continuing the vitality of rhododendrons. 1. Comprehensive strategy for pruning after azalea 1. Standardized operation of pruning residual flowers. After flowers wither, the residual flowers should be cut off in time, and the receptacle should be accurately removed using a 45° oblique shear method. Retain 1-2 cm of pedicels to avoid damaging new bud points. Pay special attention to the need to retain intact calyx for alpine rhododendron varieties. It is recommended to operate on a sunny day in the morning to facilitate rapid healing of wounds. 2. The key points of structural pruning are to cut off bad branches such as dead branches, cross branches, and inner branches from the base. The principle of "removing two and leaving one" is adopted for long branches, and the outer side bud points are retained to promote plump plant type. Western cuckoo varieties should pay attention to retaining the flower buds of the next year, and the pruning amount should be controlled within 30% of the total branch weight. 2. Scientific watering and maintenance system 1. The golden rule of water management adopts the "see the dry, see the wet" watering method, which is poured thoroughly after 2 centimeters of the surface of the basin soil is dry. Use rainwater or acidified treated water (pH 5.0 -5.5) and add 0.1% ferrous sulfate solution every month. In the rainy season, it is necessary to build a rainproof canopy to avoid root rot caused by stagnant water. 2. Environmental humidity control maintains the air humidity of 60-70%, which can be achieved by wetting pebbles on trays or spraying in the morning and evening. Pay attention to the coordination of ventilation and sunshade, and use 50% sunshade net in late spring and early summer to avoid strong light from burning new leaves. 3. Precautions for advanced maintenance 1. Tool disinfection and wound treatment Trimming knives need to be burned with alcohol or soaked in potassium permanganate solution. Incisions with a diameter of more than 1cm should be applied with healing ointment. Rhododendron special wound protector can effectively prevent the invasion of bacteria. 2. The nutrient supply plan applies thin alum fertilizer water 7-10 days after pruning, and the ratio of nitrogen, phosphorus and potassium is adjusted to 1:2:1. Combined with foliar spraying of 0.2% potassium dihydrogen phosphate to promote lignification of new branches.
Mastering the essence of these rhododendrons conservation, the plants will show more spectacular flower momentum in the next year. Regularly observe the growth status and adjust maintenance strategies based on seasonal changes. Your rhododendrons will surely become the most dazzling star in the courtyard.