Overwintering guide
How to overwinter uster's water trumpet
Winter watering
Cut watering right back — uster's water trumpet 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 uster's water trumpet in winter
Watering on the same schedule as summer. In winter that keeps the roots sodden while the plant is barely drinking, and uster's water trumpet rots from the base.
More uster's water trumpet care
Overwintering uster's water trumpet — FAQ
Does uster's water trumpet need to come indoors for winter?
No hardiness zone is recorded for uster's water trumpet; it prefers to stay above about 22°C (72°F) while in growth, so treat it as frost-tender unless you know otherwise for your area. Uster's Water Trumpet 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 uster's water trumpet for winter?
Bring indoors when nights start dropping below about 10°C, ahead of the first frost.
How often should I water uster's water trumpet in winter?
Cut watering right back — uster's water trumpet uses far less while growth slows, and cold, wet compost is the usual cause of winter root rot. Stop feeding until spring.
What kills uster's water trumpet over winter?
Watering on the same schedule as summer. In winter that keeps the roots sodden while the plant is barely drinking, and uster's water trumpet rots from the base.