Many of the tender flower bulbs such as gladiolus, cannas, dahlias and tuberous begonias require special care to assure good condition the following spring.

Gladiolus are the main type of bulb to be discussed. Dig the bulb (corm) after the first frost and cut the tops off flush with the top of the corm. Spread the bulbs in a dry, frost free place for 2-3 weeks. After curing, the old shriveled corms and roots should snap off cleanly. Those that do not clean readily are either insufficiently cured or diseased, the later is often detected by discoloration of the husks. After cleaning, dust the bulbs by shaking in a paper bag with 5% Sevin Dust (1-2 teaspoons for each 100 corms). Then store in shallow boxes on a basement floor or on low shelves.

After a frost, the dahlia, canna, and tuberous begonia root clumps should be carefully lifted with a spading fork. Shake off the greater part of the soil and cut off the tops at ground level. Tuberous begonia tops should be removed close to the tuber. Dry the clump well but not to the point that any shriveling of the roots is noticed. Place the cured clump in a large plastic bag (without holes) and tie securely. Do not divide the clump until next spring. Store in the coolest, frost-free place that you have in your home (34-40 degrees is ideal). Inspect occasionally for signs of mold which may occur, if drying was insufficient. If mold occurs, open the bag temporarily and allow the drying.

This page was last updated May 2003

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