Fall is the time to plant those spring bulbs. Hyacinths, daffodils, tulips, and narcissus are all in order for a splash of spring color. For small amounts of bulbs, Costco and other wholesalers carry reasonably priced bulbs. For larger quantities (for your woodland setting, for example) or commercial applications contact a landscape professional.
To calculate how many bulbs you need:
Number of bulbs per square foot
Tulips, standard 5 Tulips, wild 9-13
Daffodils, large 4-5 Daffodils, miniature 6-11
Hyacinthoides 5-6 Eranthis 20-24
Crocus 8-12 Allium Globemaster 1-2
Scilla 15-16 Hyacinths 3-4
Anemone blanda 20-24
In order to grow properly in Virginia, bulbs must be planted between October 1 and December 30.