Spring-flowering bulbs are planted in fall -- but there's a world of tender bulbs (more specifically, rhizomes, corms and tubers) that bloom in summer. Horticulturist George Killgore shares some tips for growing these plants. Most summer-blooming bulbs can't withstand cold winter temperatures, so they must be dug from the soil and stored in a protected place during the winter months. It's time to dig summer bulbs after the foliage has died back for the year. Lift them carefully, and shake off excess soil. Squeeze bulbs gently to make sure they're firm and healthy. Then examine each one for signs of injury or disease. If bulbs are in good condition, cut back some of the root system, and dry them in the sun for about 24 hours. Dust the bulbs with sulfur, or spray with a fungicide to prevent fungus diseases while the bulbs are in storage. Place the bulbs in paper bags with their name and color written on the outside, and place the bags in a cool, dry area for the winter. Plant again in the spring after the soil has warmed. Don't store bulbs in plastic bags: they hold moisture and could cause your bulbs to rot. To propagate summer-blooming bulbs, break off the dry foliage, and dig newly formed bulbs or corms from the soil. New corms, or cormels, are a viable source of new plant material (figure A), but it may take two years for them to bloom.
Make bulb-planting easier with a special auger that attaches to a power drill.
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