Hardiness zone checker
Enter the coldest temperature of an average winter where you live — or pick your zone directly — and see which plants can stay outside and which have to come in.
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The low of an ordinary winter, not of the worst one you remember.
Zones run from 1 (arctic) to 13 (tropical).
Your zone
USDA 8
Can stay outside
—
Have to come in
—
🌿 Hardy in your zone
Their minimum zone is at or below yours: an ordinary winter should not kill them outdoors.
🏠 Too tender for your winter
Grow them in pots and bring them in before the first frost, or treat them as annuals.
How it works
A USDA zone says one thing only: the average annual minimum temperature of a place. Each zone covers about 5.6 °C, from zone 1 below −45 °C to zone 13 above 15 °C. The encyclopedia records a zone range for the plants whose hardiness is documented; a plant goes in the outdoor list when the bottom of its range is at or below your zone. Type a temperature and the zone follows; pick a zone and the temperature range is shown.