Now is the time for planting many of our flowering bulbs for spring bloom.
Hardy, spring-flowering bulbs are planted in fall. Hardy, fall-flowering bulbs, such as colchicum, are planted in August. Tender, summer-flowering bulbs are planted in the spring after danger of frost. Lilies are best planted in late fall.
It is best to check correct planting depth for each bulb with a successful local grower or other good local source. Bulb catalog and reference book recommendations for planting may be either too shallow or too deep depending on soil condition. As a general rule of thumb, bulbs should be planted 2 1/2 to 3 times the diameter of the bulb in depth. It is important not to plant bulbs too shallow, as this will encourage frost heaving.
For complete information on bulbs, go to Virginia Cooperative Extension Here.