Overwintering guide
How to overwinter black spanish radish
Winter watering
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
The mistake that kills black spanish radish in winter
Cutting black spanish radish hard back in autumn "to tidy up". That removes the growth that shelters the crown, and on some plants removes next season's flower buds entirely.
More black spanish radish care
Overwintering black spanish radish — FAQ
Does black spanish radish need to come indoors for winter?
Black Spanish Radish is hardy to roughly USDA zone 2 — winter lows around -46°C. That means it can stay outside all winter in most temperate gardens. Black Spanish Radish is properly hardy and overwinters outside without fuss. Tidy away anything dead or diseased, apply a mulch over the crown to steady soil temperatures, and otherwise leave it alone — many hardy plants actually need a cold period to flower and grow well the following year. Save hard pruning for the right season rather than doing it in autumn.
When should I move black spanish radish for winter?
Tidy and mulch in late autumn; leave the plant undisturbed until spring.
How often should I water black spanish radish in winter?
No winter watering needed in open ground. Containers only need water in long dry, frost-free spells.
What kills black spanish radish over winter?
Cutting black spanish radish hard back in autumn "to tidy up". That removes the growth that shelters the crown, and on some plants removes next season's flower buds entirely.