Knowing how to fix your Texas lawn starts with proper maintenance. Any weed, disease or pest infestation can be avoided by creating and maintaining a schedule of feeding, watering and mowing. No Texas lawn is beyond repair and can be recovered with a little hard work and possibly a chemical or two. Once you have fixed your lawn, stick to the schedule you created and your lawn could become virtually maintenance free.
Water your lawn early in the morning, especially in the heat of the Texas summer. Late evening watering can promote fungal diseases while early morning watering allows more water to reach the roots of the lawn with the water less likely to evaporate in the early morning temperatures.
Set a watering schedule and keep it. You do not want your lawn to become dormant. Dormancy stresses your lawn grasses and makes them more susceptible to disease.
Mow your lawn consistently and often enough so that you do not remove more than 1/3 of the grass blade at any one time. Do not allow your Texas turf grasses to grow above the heights as follows: Bermuda grass 3/4 to 1-1/4 inches, St. Augustine 2 to 3 inches, zoysia 1 to 1-1/2 inches, buffalo grass 2 to 3 inches, centipede grass 1-1/2 to 2 inches, rye 1-1/2 to 2 inches and fescue 2 to 2-1/2 inches. Allowing your lawn to grow higher than these listed heights can result in a weak, thin Texas lawn that cannot crowd out weeds.
Spread pre-emergent herbicides in the late winter and early spring. These are generally granular and distributed over the entire lawn using a broadcast spreader. Pre-emergent herbicides prevent the weed seeds from germinating.
Spray your Texas lawn with herbicides to kill weeds already rooted in your lawn. Read the instructions on the herbicides carefully for the application process, as not all herbicides can be used on all species of Texas lawn grasses. Allow two weeks for the herbicides to take effect.
Apply fungicides with active ingredients such as myclobutanil, fenarimal or iprodione to control grey leaf stop and brown patches in Texas lawns. Myclobutanil is granular, while fenarimal and iprodione spray onto the lawns. Make sure you consult the directions for proper application of these fungicides.
Kill Bermuda mites in Bermuda lawns by spraying the active ingredient bifenthrin over the entire lawn. Bermuda mites are microscopic insects that appear as dry patches in the lawn. Kill cinch bugs in St. Augustine lawns by spraying the same chemical. Cinch bugs have a black body with white wings.
Spray or broadcast the active ingredient isofenphos on your Texas lawn to kill grub worms during the mid to late summer. Grub worms eat the roots of you lawn grasses from the late summer through the early spring, leaving dead grass that easily pulls from the soil.