Overwintering guide
How to overwinter ranunculus asiaticus
Winter watering
Water rarely, and only in dry spells — winter wet is a bigger risk than winter cold. Make sure containers drain freely.
The mistake that kills ranunculus asiaticus in winter
Leaving ranunculus asiaticus in a pot standing in a saucer of water. Waterlogged compost freezes solid around the roots and kills plants that would have survived the cold perfectly well.
More ranunculus asiaticus care
Overwintering ranunculus asiaticus — FAQ
Does ranunculus asiaticus need to come indoors for winter?
Ranunculus asiaticus is hardy to roughly USDA zone 8 — winter lows around -12°C. That means it survives outside in mild areas, but wants shelter in a hard winter. Ranunculus asiaticus can stay outside over winter in most areas, but appreciates some protection in a cold snap. Mulch generously over the root zone, move containers against a sheltered wall (pots freeze far harder than open ground), and have horticultural fleece ready for the worst nights. The roots are what you are protecting — top growth can be sacrificed and regrown.
When should I move ranunculus asiaticus for winter?
Mulch and move pots into shelter in late autumn, before the first hard frosts.
How often should I water ranunculus asiaticus in winter?
Water rarely, and only in dry spells — winter wet is a bigger risk than winter cold. Make sure containers drain freely.
What kills ranunculus asiaticus over winter?
Leaving ranunculus asiaticus in a pot standing in a saucer of water. Waterlogged compost freezes solid around the roots and kills plants that would have survived the cold perfectly well.