Dahlia flowers are a great way to add excitement to your vegetable garden. The petals and tubers are edible and attract honeybees that can assist in pollinating the rest of your garden. Dahlias come in a wide range of colors, all of which provide a different flavor for the taste buds. These edible flowers are in the same family as the Jerusalem artichoke and sunflower. Once the first frost hits, you should dig up the tubers and dry them so you can cook them later or grow them the following season.
Use a hand shovel to dig your tubers out of the ground once signs of frost appear. Remove the flowers and leaves. Cut the stem down so that only about six inches of it remains with each tuber. Wash each tuber under running water, and pat it dry with a towel.
Tie a piece of string around the bottom part of each root. Hang the roots in a dry, cool location for a week.
Check your tubers after a week to make sure there is no moisture left in them. Let them dry a few days longer, if needed.
Mix equal parts of sand and peat moss into your plant tray until it is full. Press the tubers underneath the soil mixture. Store them in a dry, cool location that maintains a temperature between 40 degrees Fahrenheit and 45 degrees Fahrenheit.
Rehydrate your tubers when you want to cook with them or replant them by soaking them in a bowl of water for 24 hours.