Can orchids bask in the sun in spring
As the temperature warms, orchids enter a critical growth period. Spring maintenance directly affects the growth and flowering quality of plants throughout the year. Among them, light control, rainwater irrigation and nutrient supply are the three core issues that flower lovers are most concerned about. This article will provide a professional analysis of these three points to help you master the essence of orchid maintenance in spring. Spring light management skills for orchids The light balance rules for semi-shade plants As a typical semi-shade plant, orchids can accept soft light at 8-10 o'clock in the morning in spring. At this time, the ultraviolet intensity is about 1200-1800LUX, which can effectively promote chlorophyll synthesis. It is recommended to place spring orchid, black orchid and other varieties on the east-facing balcony, and the light of cymbids can be appropriately increased to 5 hours. Noon sunshade protection plan When the temperature exceeds 25 ° C, sunshade nets need to be used between 11:00 and 15:00 (shading rate 40%-60%). Special attention should be paid to Phalaenopsis and Dendrobium, whose leaves have a water content of 85%, and yellow spots can easily be produced when exposed to light. It can be adjusted by observing the changes in leaf color: healthy leaves should be oily and dark green, and if they appear gray, they need to be shaded immediately. Orchid spring rain utilizes and protects the three major advantages of rainwater irrigation. Natural rainwater has a pH value of 5.6-6.5, is rich in dissolved oxygen (8-12mg/L) and trace elements, and can activate the vitality of orchid roots. Spring rain washing can remove leaf stomatal blockages and increase photosynthetic efficiency by more than 20%. It is recommended to implement natural rain 1-2 times a month. The key points of matrix drainage transformation adopt a layered plant structure: 3cm ceramite is laid on the bottom layer, pine bark (40%), gemstone (30%), and perlite (20%) are mixed in the middle layer, and the surface layer is covered with water moss. This structure has a penetration rate of 200ml/min, which ensures no water accumulation in 30mm/h of rainfall. After getting wet, ventilation needs to be strengthened and convection at low speed with an electric fan for 3 hours. Spring nutrient replenishment strategy for orchids fertilization timing criteria Start fertilization when new buds unfold 2-3 true leaves and crystal heads appear at the base of false bulbs (usually 15-20 days after flowering wither). At this time, the root absorption capacity reaches its peak, and the ratio of nitrogen, phosphorus and potassium demand is 3:1:2. Special slow-release fertilizer for orchids can be used combined with foliar fertilizer. The practical plan of thin fertilizer and frequent application dilutes the fertilizer concentration to 1/2 of the marked amount, and applies 2000 times liquid fertilizer every 10 days. It is recommended to use the "sandwich" fertilization method: water thoroughly first, liquid fertilizer is applied 1 hour later, and water back the next day. When used together with EM inoculant, the fertilizer utilization rate can be increased by 40%.
Scientific spring maintenance can increase the germination of new orchid buds by 50%, and the leaf thickness can be increased by 0.2- 0.3 mm. It is recommended to record plant growth data every week and dynamically adjust the maintenance plan based on changes in temperature and humidity. Only by mastering the art of balancing light, warm water and fertilizer can we cultivate high-quality orchids with straight leaves and clear flowers.