Outsidepride Texas Bluebonnet Wild Flower Seed - 1/4 LB Texas bluebonnet is an annual wildflower and is the state flower of Texas. It will grow in USDA Zones 3 - 10. These wildflowers will bloom in just approximately 70 days when planted from seeds. These heirloom, non gmo seeds will produce flowers growing 12 - 24 inches tall. Grow in full sun and in well-drained, sandy soil. Sow these flower seeds at 1 - 2 pounds per 1,000 square feet.