Lift and Store Dahlia Tubers
Dahlia tubers need lifting before winter frosts. Learn how to dig, dry, pack and store them in a frost-free place so they survive until spring.
Quick answer
Wait for frost to blacken the foliage. Cut stems to 15 cm. Lift carefully with a fork. Dry for two weeks. Pack in dry compost or sand. Store frost-free.
Dahlias are not fully hardy. Lift the tubers after the first frost and store them in a frost-free place over winter. This protects them from rot and freezing damage.
What you’ll need
- garden fork
- secateurs
- trays
- dry compost or sand
- newspaper
- frost-free shed or garage
- labels
Step by step
- 1
Wait for frost
Let the foliage blacken after the first frost. This signals the plant to go dormant.
- 2
Cut back stems
Use secateurs to trim stems to 10–15 cm above the soil. Leave a handle to grip when lifting.
- 3
Lift the tubers
Insert a garden fork well outside the stem and lever gently. Shake off loose soil. Do not wash the tubers.
- 4
Dry and inspect
Lay tubers upside down in trays for one to two weeks in a dry, airy place. Cut away any rotten or damaged parts.
- 5
Pack for storage
Nestle tubers in trays of dry compost, sand or wrap individually in newspaper. Label each variety.
- 6
Store in a frost-free place
Keep trays in a shed or garage that stays above freezing. Check monthly and remove any that go soft or mouldy.
Secateurs are sharp. Wear gloves and cut away from your body. Garden forks can pierce tubers if pushed too close to the stem.
Common mistakes
- Lifting before frost while the plant is still active
- Washing tubers and trapping moisture
- Storing in a damp place that causes mould
- Forgetting to label varieties
Frequently asked
When should I lift dahlia tubers?
After the first frost blackens the foliage, usually in late autumn.
Can I leave dahlias in the ground?
Only in mild areas with free-draining soil and a thick mulch. Lifting is safer in cold or wet gardens.
How do I know if a tuber has rotted?
It feels soft or smells bad. Cut away rot with clean secateurs and let the cut dry before packing.
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