Root Rot

Overwatering

To address root rot in Hoya Krimson Queen, first, cease watering immediately and allow the soil to dry out. If the plant is severely affected, remove it from its pot, trim away any black, mushy roots, and repot in fresh, well-draining soil. Ensure the pot has adequate drainage holes. Going forward, water only when the top inch of soil feels dry to the touch, and avoid letting the pot sit in standing water.

Mealybugs Infestation

Mealybugs are small, soft-bodied insects covered with a white, waxy substance. They typically infest the undersides of the leaves and stem joints, sucking sap and weakening the plant.

To combat mealybugs, start by isolating the infected plant to prevent the spread to others. Use a cotton swab dipped in rubbing alcohol to dab directly onto the pests, effectively killing them. For larger infestations, rinse the plant with a strong stream of water to dislodge the pests, then apply neem oil or insecticidal soap as a foliar spray, following the product's instructions. Repeat the treatment every 7-10 days until the infestation is cleared. Regularly check the plant for any signs of return.