Protect tender plants from light freezes by covering them with sheets, plastic or boxes. When night temperatures begin dropping below 40 degrees, bring in any tropical plants you are keeping outside. Dahlias are particularly sensitive to frost. Cut off the main stalk a foot above the ground just before frost. Dig out the tubers, being careful not to cut them, gently knock off the dirt, and let them dry for a few hours.
Hardy bulbs deserve more use in Midwest gardens.
They add versatility in color, flower form and fragrance. With careful planning, these bulbs will flower from early spring through autumn. Make sure bulbs are plump and firm, not dried and shriveled. Those with soft spots or excessive mold should not be purchased. Lily bulbs should have short white fleshy roots already attached.