Spring bulb calendar
Autumn to early winter is the time to plant daffodils, crocus, tulips, hyacinths and other spring-blooming bulbs. Wait until the soil temperature at the planting depth has fallen below 60 degrees. In general, October is recommended for Zone 6 and November to early December in Zones 7-8. However, bulbs can be planted any time before the ground freezes hard and soil can still be worked. Depending on the species and variety, bulbs need a cold period of 6 to 20 weeks. Choose firm, healthy bulbs. If you can’t plant them right away, keep them in a cool location (50-65 degrees F) until planting.