Overwintering guide
How to overwinter common water hyacinth
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 common water hyacinth in winter
Leaving common water hyacinth 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 common water hyacinth care
- Overwintering common water hyacinth — our other guide for the same plant
- Full common water hyacinth care guide
- Common Water Hyacinth temperature range
- How often to water common water hyacinth
- How to prune common water hyacinth
- Common common water hyacinth problems & fixes
- Best plant identifier apps — tested and ranked
Overwintering common water hyacinth — FAQ
Does common water hyacinth need to come indoors for winter?
Common Water Hyacinth 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. Common Water Hyacinth 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 common water hyacinth for winter?
Mulch and move pots into shelter in late autumn, before the first hard frosts.
How often should I water common water hyacinth 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 common water hyacinth over winter?
Leaving common water hyacinth 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.