Overwintering Cannas in Zone 5: Digging Is Mandatory — Mulch Won’t Save Them

Hardiness Fact

Cannas are hardy only to Zone 7. Zone 5 winters kill them in ground, even with heavy mulch.

Required Action

1. Dig immediately after frost kills tops.
2. Brush off soil — do not wash.
3. Store in cool (40–50°F), dark, dry basement — cover with dry straw or vermiculite.
4. Replant after last frost next spring.

No Shortcuts

Mulch, leaves, boxes — none work reliably in Zone 5. Digging is the only way to keep your cannas.