Cultivation method of Rhododendron tenulosa
As a rare species among alpine flowers, Rhododendron multiflorum is favored by gardening enthusiasts for its unique velvety leaf texture and gorgeous flower appearance. This kind of plant, which likes shade and is afraid of scorching heat, has special requirements on its growth environment. Only by mastering scientific maintenance methods can it shine in the courtyard or balcony. 1. Key points of environmental control Temperature and light management The optimal growth temperature of Rhododendron deltosa is between 15-22℃. If it exceeds 28℃ in summer, sunshade nets are needed to be protected, and leaf spray is used to cool down in the morning and evening. Maintaining above 5 ° C in winter can safely overwinter, receiving full sunshine in spring, and 50% shading in summer. Water control techniques adopt the watering principle of "see dry, see wet", and the soil moisture is maintained at 60%-70%. Use acidified water with pH 5.5 -6.5 (rainwater is the best), and adjust the soil pH with white vinegar mixed with water (1:1000) every month. The air humidity needs to be maintained above 65%, which can be achieved by laying wet pebbles on trays. 2. Propagation and modeling techniques Cutting propagation steps Select semi-lignified twigs, retain 3-4 leaves, dip the incision in rooting powder, and insert them into a substrate with perlite: vermiculite =3:1. Maintain a constant temperature of 25℃ and 80% humidity environment, take root for about 45 days and transplant. Cultivation method of artistic style trimmed hairy rib rhododendron
Immediately after flowering, carry out shaping and pruning, remove crossed branches and excessively dense branches, and retain 3-5 main branches. During the growing period, lightly cut the long branches every month to keep the crown transparent. Cliff-style bonsai can be made by coiling aluminum wires. 3. Disease and insect pest control system Disease early warning system Leaf spot disease appears as brown dots at the beginning, and can be controlled with 70% mancozeb 800 times solution. The prevention of root rot requires regular application of Bacillus subtilis, changing pots and cutting off rotten root systems when the disease occurs. During the epidemic period for ecological pest control, yellow sticky insect boards are hung and combined with spraying matrine biopesticides. To control red spider, you can use 3000 times of 40% biphenylhydrazate suspension, focusing on the back of leaves. 4. Advanced maintenance strategy Apply high-phosphorus water-soluble fertilizer (N-P-K=10-30-20) 60 days before flowering, combined with supplementary iron chelate fertilizer to prevent yellow leaves. Stop fertilizer and control water in winter, and keep the substrate moist. Using a formula soil with pine needle soil: deer swamp soil: red jade soil =4:3:3 can ensure root health.
By systematically mastering temperature, light, water and fertilizer control, pest and disease control and modeling techniques, Rhododendron pilosum can not only become a highlight of home greening, but also cultivate high-quality plants that have been passed down for generations through cuttage propagation. Regularly observing the status of plants and establishing a maintenance log will help you gradually grow into a rhododendron maintenance expert.