Texas (along with Oklahoma) is what botanists call its own "Floristic Region." That's why the area is famous for its wildflowers, and why many famous flowers in the Texas region are different from other areas in North America. This mixture is custom made for the unique flora of the region, featuring all favorites. Hardiness zones: 6-9 (-20øC/-5øF, -5øC/25øF) in winter. This mix contains 27 species adapted to the region, where the summer temperature during the day is around 88-92øF (26-33øC) and 70-74øF (21-23øC) at night. The rainy season occurs mostly from April to September. These flowers will grow well in any fertile, well-drained soil. Do not fertilize wildflowers unless the soil is extremely depleted of nutrients. Fertilizers encourage weed growth and lush foliage rather than flowers. If the soil needs improvement, we suggest adding organic matter such as weed-free grass clippings, well rotted compost or peat moss. The wild flowers need to be watered regularly during the summer to keep the plants at their peak. To aid in natural reseeding and to keep a neat appearance, you can mow the flowers after they have gone to seed and lost their bloom. Mow them at a height of 4-6 inches-mowing below 3 inches could damage the perennial flowers.