Winter Storage for Dahlias

Removal from Ground

• The gardener should cut the stems of the dahlia plant back to approximately 6 inches in height, gently dig around the plant, and lift the bulb from the ground. After the bulbs are washed, they must be allowed to dry out in a cool, frost-free location with ample airflow for approximately two weeks.

Storage Considerations

• Dusting the bulbs with a sulfur-based bulb fungicide will help prevent fungal infections from developing during the winter months. The bulbs may be stored in peat moss or vermiculite, in trays or paper bags. The American Dahlia Society suggests wrapping the bulbs in plastic for winter storage.

Warning

• The bulbs require a dark, dry location for storage, according to Ohio State University Extension, with a temperature of 40 to 55 degrees Fahrenheit. They should be checked once or twice during the winter months to make sure there are no signs of fungus. If the bulbs appear discolored or shriveled, they should be discarded promptly to prevent spread of infection.