Tulips planted in the spring will not bloom, since bulbs require long periods of cold temperatures to bloom properly.
Although bulbs may not be planted outside in the spring, the bulbs may be refrigerated and forced for indoor planting.
Tulips may take about 16 weeks to grow. Bulbs stored in the cold for longer will typically grow taller than those with shorter periods of cold.
Gardeners in U.S. Department of Agriculture zones 4 and 5 typically plant tulip bulbs outside in September or October. Those in zones 6 and 7 should plant tulips between October and November. Plant bulbs in November or December if you are in hardiness zones 8 and 9. Although growing tulips in zone 10 is difficult, plant the bulbs in January after refrigerating for several weeks.