Gardening Articles: Flowers :: Bulbs
Timing Spring Bulb Planting (page 2 of 2)
by National Gardening Association Editors
Even within a given climate zone, fall temperatures can vary widely from year to year. A good rule of thumb is to plant spring-flowering bulbs when the soil temperature 6 inches below the surface is below 60° F.
Bulbs that were not planted in fall at the proper time can be forced indoors this winter (see how-to project on forcing paper whites) or, if the ground still isn't frozen, planted in the garden. Depending on the severity of the winter, bulbs planted out late in the season may not flower the following spring.