Overwintering guide
How to overwinter lobelia erinus 'cascade blue'
Winter watering
Cut watering right back — lobelia erinus 'cascade blue' 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 lobelia erinus 'cascade blue' in winter
Watering on the same schedule as summer. In winter that keeps the roots sodden while the plant is barely drinking, and lobelia erinus 'cascade blue' rots from the base.
More lobelia erinus 'cascade blue' care
- Overwintering edging lobelia — the species this cultivar belongs to
- Full lobelia erinus 'cascade blue' care guide
- Lobelia erinus 'Cascade Blue' temperature range
- How often to water lobelia erinus 'cascade blue'
- How to prune lobelia erinus 'cascade blue'
- Common lobelia erinus 'cascade blue' problems & fixes
- Best plant identifier apps — tested and ranked
Overwintering lobelia erinus 'cascade blue' — FAQ
Does lobelia erinus 'cascade blue' need to come indoors for winter?
Lobelia erinus 'Cascade Blue' is hardy to roughly USDA zone 10 — winter lows around -1°C. That means it will not survive frost and needs to come inside. Lobelia erinus 'Cascade Blue' 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 lobelia erinus 'cascade blue' for winter?
Bring indoors when nights start dropping below about 10°C, ahead of the first frost.
How often should I water lobelia erinus 'cascade blue' in winter?
Cut watering right back — lobelia erinus 'cascade blue' uses far less while growth slows, and cold, wet compost is the usual cause of winter root rot. Stop feeding until spring.
What kills lobelia erinus 'cascade blue' over winter?
Watering on the same schedule as summer. In winter that keeps the roots sodden while the plant is barely drinking, and lobelia erinus 'cascade blue' rots from the base.