|Calla Lily, hardy to zone 8, overwintered in zone 7 with protective winter mulch|
1. After the first good frost, cut off the browning foliage and carefully dig up the bulbs, avoiding bruising them. Gently brush off excess dirt.
|Digging up Gladiolus murielae corms|
Sometimes those corms will have lots of little baby 'cormlets' on them. Just separate them gently from the main corm. You can keep them for planting next year if you like; they will eventually grow big.
|a corm with lots of little baby 'cormlets' attached|
4. Store in paper bags or cardboard boxes filled with peat moss, sand, vermiculite, or sawdust. Gladiolus can just be stored in paper bags or onion bags, or in a box between sheets of newspaper. For some tubers and corms, such as Dahlias, Foxtail Lilies, and Rain Lilies, the peat moss or other medium should be very slightly dampened, so that they do not completely dry and shrivel up.
|Don't forget to label your bulbs!|
6. Plant next spring...
|Dahlia 'Kelvin Floodlight'|
Here are a couple other resources that list how to store different kinds of bulbs:
A.D.R. Bulbs: preserving summer bulbs
P. Allen Smith: storing summer bulbs