Echeveria · Succulent
Root rot: Ensure sharp drainage with gritty compost and water only when dry, keeping plants above 10°C in winter.
Mealybugs: Isolate the plant and dab infestations with a cotton bud dipped in methylated spirits or apply insecticidal soap.
Aphids: Wash off with a strong jet of water or treat with a systemic insecticide if infestations are severe.
Powdery mildew: Improve air circulation around plants and avoid wetting foliage when watering.
Leaf burn from fluoride: Water exclusively with rainwater or filtered water to avoid tap water containing fluoride.