Except for the species tulips, top-quality bulbs are 12 centimeters or more in circumference. In selecting bulbs, make sure there are no soft spots, blemishes or fungi growing on the bulbs. Planting can occur into December if the ground is not frozen. Tulips perform best in full sun and well-drained soils. Tulips should receive at least six to eight hours of sun.
Tulip bulbs decline rapidly in shady locations.
The bulbs often rot in wet, poorly drained locations. To help your tulips last as long as possible, plant the bulbs 6 to 8 inches deep. Planting depth is measured from the top of the bulb to the soil surface, including mulch. After planting your tulip bulbs, make sure to water them. Watering enables the bulbs to develop a good root system before winter.