What to Do When Euphorbia Lai Erodes
As a cactaceae plant with unique shapes, Euphorbia lai is favored by succulent enthusiasts for its star-shaped ridges. However, root rot is a common issue during care. This article analyzes four core care points to help enthusiasts quickly diagnose the cause of root rot and provide targeted solutions.
One, Soil Medium Optimization Solution
1.1 Substrate Ratio Improvement
A mix of 70% particle soil (akadama soil + kusakushi soil) + 20% decomposed leaf soil + 10% limestone debris ensures both drainage and necessary nutrients. It is recommended to place a 3cm thick layer of ceramsite at the bottom of the pot, combined with bottom drainage holes to prevent waterlogging.
1.2 Potting Operation Specifications
If root rot is found, the plant should be immediately removed from the pot, the rotting roots pruned, and then soaked in a carbendazim solution for 30 minutes. After 2-3 days of drying the roots, repot using moist soil and place the plant in a well-ventilated area with diffused light for 7-10 days.
Two, Water and Fertilizer Management Techniques
2.1 Scientific Watering Schedule
In the spring and autumn growing seasons, follow the 'thoroughly wet and dry' principle, extend to every 15 days during the summer high-temperature dormancy period, and keep the potting soil completely dry in winter. It is recommended to use a soil moisture meter to assist in judgment.
2.2 Precision Fertilization Plan
Apply phosphorus-potassium fertilizer (N-P-K=5-15-30) once a month during the growing season, with a diluted concentration of 1500 times. Stop fertilizing in winter to avoid secondary root rot caused by uncomposted organic fertilizer.
Three, Environmental Control Key Points
3.1 Light Intensity Control
Ensure 4 hours of direct sunlight daily, and use a shade net to filter strong ultraviolet light in summer. For supplemental lighting, choose a full-spectrum LED light, positioned 40cm away from the plant for 6 hours/day.
3.2 Ventilation System Optimization
Maintain an air flow speed of 0.3-0.5m/s, and use a circulating fan with a timer. During the rainy season, use a dehumidifier to keep humidity between 40%-50%.
By improving the cultivation substrate, standardizing water and fertilizer management, and optimizing the growing environment, combined with regular root inspections (recommended pot removal every quarter), Euphorbia lai root rot issues can be effectively prevented. If rot has occurred, follow the four-step emergency treatment method of 'root pruning - disinfection - root drying - repotting,' and the survival rate can reach over 85%.