Can orchids be repotted in summer?
Summer is a crucial stage in the growth of orchids, and reasonable maintenance methods directly affect the health of the plant. This article will provide professional advice on the most concerning issues of repotting and watering for orchid enthusiasts, taking into account the characteristics of the season.
Golden Rules for Repotting Orchids
Risk Analysis of Repotting in Summer
When the temperature continues to exceed 30℃, the orchid enters a semi-dormant state, and repotting at this time can easily lead to root dehydration. Every 5℃ increase in substrate temperature results in a 40% decrease in root cell activity, and the high humidity environment in summer increases the probability of wound infection by more than 3 times. Emergency repotting measures should only be taken when there is a crisis of root rot or the pot is severely damaged.
Scientific Timing for Repotting
It is recommended to operate around the Spring Equinox (March) or White Dew (September), when the temperature difference between day and night is stable at 8-12℃. If repotting is necessary during abnormal seasons, apply a fungicide solution (Duchefa 800x) to the roots 3 days in advance, and after repotting, place the plant in a constant temperature environment of 25℃, maintain air circulation, and use LED grow lights.
Orchid Leaf Maintenance Strategies
Proper Way to Water for Cooling
Use a misting sprayer before 10:00 in the summer, spray at a 45-degree angle 30cm away from the leaves, focusing on moistening the stomata on the back of the leaves. Ensure that the water temperature difference from room temperature does not exceed 3℃, and avoid operating during the high noon heat to prevent scorching spots. Using 0.1% potassium dihydrogen phosphate as a foliar fertilizer can enhance plant stress resistance.
Environmental Humidity Control Techniques
Maintain a humidity of 60-70% with a water curtain circulation system, and do not exceed 2 sprays per day. Methods such as covering the surface of the growing medium with moss or watering through a pot can reduce the risk of water accumulation in the leaf heart caused by frequent watering and prevent soft rot disease.
Mastering the key points of seasonal maintenance can avoid repotting damage and create a suitable microenvironment through scientific watering. It is recommended to regularly check the breathability of the growing medium and accurately control the temperature and humidity with a thermometer and hygrometer to ensure the orchid can safely survive the summer.