Growli

Overwintering guide

How to overwinter pseuderanthemum carruthersii var. carruthersii

Verdict
Bring indoors
When
Bring indoors when nights start dropping below about 10°C, ahead of the first frost.
Hardiness
Pseuderanthemum carruthersii var. carruthersii is hardy to roughly USDA zone 10 — winter lows around -1°C. That means it will not survive frost and needs to come inside.

Winter watering

Cut watering right back — pseuderanthemum carruthersii var. carruthersii 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 pseuderanthemum carruthersii var. carruthersii in winter

Watering on the same schedule as summer. In winter that keeps the roots sodden while the plant is barely drinking, and pseuderanthemum carruthersii var. carruthersii rots from the base.

More pseuderanthemum carruthersii var. carruthersii care

Overwintering pseuderanthemum carruthersii var. carruthersii — FAQ

Does pseuderanthemum carruthersii var. carruthersii need to come indoors for winter?

Pseuderanthemum carruthersii var. carruthersii is hardy to roughly USDA zone 10 — winter lows around -1°C. That means it will not survive frost and needs to come inside. Pseuderanthemum carruthersii var. carruthersii 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 pseuderanthemum carruthersii var. carruthersii for winter?

Bring indoors when nights start dropping below about 10°C, ahead of the first frost.

How often should I water pseuderanthemum carruthersii var. carruthersii in winter?

Cut watering right back — pseuderanthemum carruthersii var. carruthersii uses far less while growth slows, and cold, wet compost is the usual cause of winter root rot. Stop feeding until spring.

What kills pseuderanthemum carruthersii var. carruthersii over winter?

Watering on the same schedule as summer. In winter that keeps the roots sodden while the plant is barely drinking, and pseuderanthemum carruthersii var. carruthersii rots from the base.