What to Do About Rotting Heart in Clivia? A Full Guide to Prevention and Control Measures
Clivia is native to southern Africa, growing beneath trees, so it fears heat and cannot tolerate cold; it prefers a semi-shaded and moist environment, dreads strong direct sunlight, and its optimal growing temperature is between 18-22°C. Below 5°C and above 30°C, growth is inhibited. Clivia likes a well-ventilated environment, prefers deep, fertile, loose soil, and is suitable for indoor cultivation. So what are the prevention and control measures when rotting heart occurs in Clivia?
Symptoms: After a Clivia plant finishes flowering, improper handling of the flower stalk can easily cause the plant's heart to rot. In hot seasons, due to watering mistakes, dirty water flowing into the leaf rosette causes the young heart leaves of the Clivia plant to rot and die. Fertilizer that has not been fully decomposed causes the Clivia's heart leaves to rot.
Causes: First, after flowering and setting seed, the soon-to-wither flower stalk was not properly handled, so the sap flowing out after the flower stalk broke accumulated in the leaf rosette, causing the heart leaves to rot. Second, in hot seasons, dirty water was allowed to flow into the leaf rosette during watering, causing rotting heart. Third, improper fertilization: organic fertilizer that has not yet decomposed damages the growing point in the heart leaf rosette, causing rotting heart.
Prevention and Control Methods
1. For rotting heart caused by improper handling of the flower stalk, note that after the Clivia flowering period ends there is a short pause in growth. Watering should be reduced, keeping the soil only slightly moist. Cut off the withered flower stalk and promptly use clean toilet paper or absorbent cotton to blot up the sap that flows out. Throughout the entire process from the remaining flower stalk withering to new leaves emerging, do not let water get into the leaf rosette.
2. For rotting heart caused by dirty water, take the plant out of the flowerpot, shake off the old soil and rinse it clean. Completely remove the rotted parts, then use a 75% alcohol cotton ball to repeatedly wipe the rotting heart wound and its surroundings clean. Repot it in plain soil, burying it only down to the root crown. Keep the potting soil slightly moist, place it in a cool, semi-sunny spot, and avoid rainwater pouring into the leaf rosette and causing rotting heart again. No longer spray water on the leaves; instead, use a damp cloth to wipe away dust clinging to the leaf surface. Only when the new sprout leaves have grown to 5 cm-8 cm long may normal water and fertilizer management be resumed.
3. For rotting heart caused by the subsequent fermentation of undecomposed organic fertilizer, the plant with rotting heart should be taken out of the pot, the rotted roots and leaves cut off, and the plant washed clean with clear water. Then place its roots in a 0.3% potassium permanganate solution and soak for 2 hours. After taking it out, let it dry in a cool place for 12 hours, then plant it in fresh, sterilized potting soil. It can be expected to sprout and grow leaves again.