Lewisville, Texas encompasses USDA hardiness zones 7b to 8a, so gardeners should select lawn flowers adapted to that climate. This temperate climate supports a wide array of wildflower and lawn flower plants. Whether using clover or common Texas wildflowers such as coneflower, yucca, larkspur or columbine, the key to establishing lawn flowers amidst—and not instead of—a lawn is to mow and rake the lawn before seeding. Once established, lawn flowers should reseed each year to provide a unique lawn or meadow for years to come.
Mow your lawn close to the ground then rake up and discard clippings if your lawnmower does not automatically collect them.
Rake the soil with a grass rake to loosen the top 1/4 inch of soil so the lawn flower seeds have some chance of penetrating the soil. Work the rake back and forth to loosen the soil. To plant flowers amidst grass, you need to leave the grass established, so you cannot till it under.
Cast your lawn flower seeds over the soil by hand. Add 2 to 8 oz. of seed per 1,000 square feet of yard, using a higher rate of seed if you wish to have mostly flowers and the lower rate to have scattered flowers and predominant lawn.
Water the lawn until the soil becomes moist. The grass will help prevent the seed from washing away, so you don't need to cover the flower seed.
Keep the lawn moist by watering twice a day until your flower seeds germinate, typically within two weeks.