Overwintering guide
How to overwinter dahlia 'ace summer sunset'
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 dahlia 'ace summer sunset' in winter
Leaving dahlia 'ace summer sunset' 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 dahlia 'ace summer sunset' care
Overwintering dahlia 'ace summer sunset' — FAQ
Does dahlia 'ace summer sunset' need to come indoors for winter?
Dahlia 'Ace Summer Sunset' 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. Dahlia 'Ace Summer Sunset' 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 dahlia 'ace summer sunset' for winter?
Mulch and move pots into shelter in late autumn, before the first hard frosts.
How often should I water dahlia 'ace summer sunset' 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 dahlia 'ace summer sunset' over winter?
Leaving dahlia 'ace summer sunset' 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.