Root Rot

Overwatering

To address root rot in sunny star croton, first, allow the soil to dry out before watering again. Ensure the pot has adequate drainage holes and consider repotting the plant in fresh, well-draining soil. If the plant is severely affected, trim away the rotted roots before repotting. To prevent future occurrences, water the plant only when the top inch of soil feels dry to the touch and ensure the pot is not sitting in water.

Leaf Drop

Underwatering

To address leaf drop caused by underwatering in sunny star croton, ensure the plant is watered regularly, allowing the top inch of soil to dry out between waterings. Crotons prefer a humid environment, so consider placing a humidifier nearby or placing the pot on a tray filled with pebbles and water to increase humidity. Avoid letting the plant sit in waterlogged soil to prevent root rot. Adjust watering frequency with seasonal changes, as indoor heating can dry out the air in winter.

Leaf Spot Disease

Fungal or bacterial pathogens

To manage leaf spot disease, ensure your plant is in a well-ventilated area to reduce humidity around the foliage. Remove and dispose of any infected leaves to prevent the spread of the disease. Avoid overhead watering to keep the leaves dry. If the infection is severe, applying a fungicide or bactericide, as appropriate, following the manufacturer's instructions, can help control the disease. Regularly inspect your plant for early signs of leaf spots to manage the issue promptly.