What to Do When a Cactus Rotting
Many plant enthusiasts panic when they discover that their beloved cactus has root rot. However, with the correct approach, 90% of cacti with rotten roots can be revived. This article will introduce in detail the full-process emergency treatment plan from incision treatment to re-planting, allowing your succulent plant to recover its health and vitality.
I. Excision of Lesions and Wound Treatment
1.1 Criteria for Judging the Degree of Decay
Healthy cactus tissue should appear plump and dark green. When yellow-brown soft rot or black lesions appear, immediate action is required. Use a gardening knife disinfected with alcohol to make an oblique cut 1 cm outside the edge of the lesion, ensuring the cut is flat and smooth.
1.2 Key Points for Root Cleaning
After removing the pot, gently shake the roots, cut off all black and soft fibrous roots, and retain the main root to a length of at least 3 cm. Use a magnifying glass to inspect the cross-section of the cut to ensure no residual brown lesion tissue remains.
II. Thorough Disinfection and Protective Treatment
2.1 Scientific Dilution Ratio of Disinfectant
It is recommended to use hydrogen peroxide (3% concentration) diluted with water at a ratio of 1:5, or potassium permanganate solution (0.1% concentration). Submerge the treated plant completely for 25 minutes, which can kill 99% of pathogens.
2.2 Wound Healing Management
After disinfection, place it in a well-ventilated area with scattered light for 3-5 days until a white healing layer has fully formed on the cut. In humid southern regions, sprinkle wood charcoal powder to accelerate drying and prevent secondary infections.
III. Scientific Planting and Maintenance
3.1 Golden Ratio for Substrate Preparation
Use a mixed substrate of volcanic rock: red jade soil: decomposed leaf soil in a ratio of 5:3:2, and use it after sterilization with high-temperature steam. It is recommended to choose a red pottery pot with good breathability, and place a 3 cm thick layer of ceramic stones at the bottom for drainage.
3.2 Key Points for Maintenance During the Revitalization Period
After planting, maintain an ambient temperature of 25-30°C, completely stop watering for the first 15 days, and then water a small amount along the edge of the pot every 20 days. After new buds sprout, gradually increase the light to 4 hours of scattered light per day.
Through the above systematic treatment plan, combined with scientific post-treatment care, not only can save a cactus with rotten roots, but also enhance the plant's disease resistance. The key is to detect promptly, operate standardized, and adjust the environment to allow the desert spirit to regain vitality.