Euphorbia horrida · Succulent
Root rot: Ensure excellent drainage with gritty compost and avoid overwatering, especially in winter.
Mealybugs: Isolate the plant and treat infested areas with a cotton bud dipped in methylated spirits.
Vine weevil: Use biological nematodes or systemic insecticides in the compost during active growth periods.
Scale insects: Scrape off visible scales and apply horticultural oil or insecticidal soap to control populations.
Sunburn: Acclimate plants gradually to brighter conditions and avoid sudden exposure to harsh midday sun.