We get a lot of questions about flower bulbs, but most involve when to plant them. Quite simply, "fall" flower bulbs are planted in the fall, grow roots into winter, then sprout and bloom in the spring. These include favorites such as tulips, daffodils, hyacinth and others. "Spring" flower bulbs are also known as tender bulbs (they don't survive cold ground temperatures); they're planted in the spring and flower throughout the summer. They include dahlias, glads, cannas, calla lilies and others. You can view these products by their planting seasons — Fall Planted Bulbs or Spring Planted Bulbs .