Overwintering guide
How to overwinter monarch of the east
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 monarch of the east in winter
Leaving monarch of the east 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 monarch of the east care
Overwintering monarch of the east — FAQ
Does monarch of the east need to come indoors for winter?
Monarch of the East 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. Monarch of the East 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 monarch of the east for winter?
Mulch and move pots into shelter in late autumn, before the first hard frosts.
How often should I water monarch of the east 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 monarch of the east over winter?
Leaving monarch of the east 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.