Summer Bulb Storage Over Winter

To survive the winter. non-hardy summer flowering bulbs need to be "lifted" out of the ground in the fall and stored inside in a cool place where temperatures stay above 50 degrees.  This technique has been very successful for many of the local dahlia growers and is appropriate for canna, caladium, begonia, elephant ears and any other non-hardy bulbs.  The goal is to keep the bulbs hydrated during the dormant season but not moist enough to encourage rotting. The best media for bulb storage is vermiculite.

1. After the first hard frost, the foliage will darken on the plants. Cut the stems off 3-4" above the soil line. Dig the bulbs out of the ground and knock off as much soil as possible.
2. Divide clumps now for easier storage, saving the largest and healthiest. Dispose of any diseased or insect infested parts.
3. Allow the bulbs to air dry for 4-5 hours, just until the skin hardens slightly.
4. Place vermiculite into plastic storage bag and moisten slightly.
5. Place the bulbs into the vermiculite in the plastic bag, close the bag, but leave a small opening for ventilation. Check monthly during the winter months to ensure that the vermiculite stays moist.
6. Store in a cool, dark location like a basement where temperatures stay above 50 degrees.