In addition it's a good idea to remove fallen leaves from naturalized areas, though mulching leaves back into the soil is an easy and even beneficial alternative. If they can't be planted immediately, store them in a cool, dry place with good air circulation. Bulbs are not dormant, they are living plants. Some bulbs, such as Galanthus , Fritillaria , Lily , Erythronium dens-canis , and Leucojum should be protected from drying out. In borders where tulips have been planted for several years, fungi could be present.
Rotation is, of course, the organic alternative.
Plant in areas that drain well. Standing water rots bulbs. Conversely, however, bulbs do not root deeply and need soil that retains moisture well. It may be desirable to amend the soil with sand or peat. A pH between 5.5 and 7.5 is ideal.