These articles are written to apply to the northeastern corner of Illinois. Problems and timing may not apply outside of this area.
Most species are dependable and can flower season after season.
Some also make excellent choices for naturalization of the backyard. October is the time for planting. Since bulbs are expected to keep returning for several years, it is important to prepare planting sites properly. Good soil drainage is probably the single most important consideration. Add compost, peat, rotted manure, or other organic matter to improve heavy clay soils.