Overwintering guide
How to overwinter spear-leaved arrowhead vine
Winter watering
Cut watering right back — spear-leaved arrowhead vine 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 spear-leaved arrowhead vine in winter
Watering on the same schedule as summer. In winter that keeps the roots sodden while the plant is barely drinking, and spear-leaved arrowhead vine rots from the base.
More spear-leaved arrowhead vine care
Overwintering spear-leaved arrowhead vine — FAQ
Does spear-leaved arrowhead vine need to come indoors for winter?
spear-leaved arrowhead vine is hardy to roughly USDA zone 10 — winter lows around -1°C. That means it will not survive frost and needs to come inside. spear-leaved arrowhead vine 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 spear-leaved arrowhead vine for winter?
Bring indoors when nights start dropping below about 10°C, ahead of the first frost.
How often should I water spear-leaved arrowhead vine in winter?
Cut watering right back — spear-leaved arrowhead vine uses far less while growth slows, and cold, wet compost is the usual cause of winter root rot. Stop feeding until spring.
What kills spear-leaved arrowhead vine over winter?
Watering on the same schedule as summer. In winter that keeps the roots sodden while the plant is barely drinking, and spear-leaved arrowhead vine rots from the base.