Overwintering guide
How to overwinter blue melon cactus
Winter watering
Cut watering right back — blue melon cactus uses far less while growth slows, and cold, wet compost is the usual cause of winter root rot. Stop feeding until spring.
The mistake that kills blue melon cactus in winter
Watering on the same schedule as summer. In winter that keeps the roots sodden while the plant is barely drinking, and blue melon cactus rots from the base.
More blue melon cactus care
Overwintering blue melon cactus — FAQ
Does blue melon cactus need to come indoors for winter?
Blue Melon Cactus is hardy to roughly USDA zone 11 — winter lows around 4°C. That means it will not survive frost and needs to come inside. Blue Melon Cactus is frost-tender, so overwintering means bringing it inside and letting it rest rather than pushing it to grow. Move it indoors well before the first frost, give it the brightest spot you have (light levels indoors drop sharply in winter), and keep it away from both cold window glass and hot radiators — the swing between the two does more damage than the cold itself.
When should I move blue melon cactus for winter?
Bring indoors when nights start dropping below about 10°C, ahead of the first frost.
How often should I water blue melon cactus in winter?
Cut watering right back — blue melon cactus uses far less while growth slows, and cold, wet compost is the usual cause of winter root rot. Stop feeding until spring.
What kills blue melon cactus over winter?
Watering on the same schedule as summer. In winter that keeps the roots sodden while the plant is barely drinking, and blue melon cactus rots from the base.