A brown lawn is usually caused by drought stress, dormancy, disease, pests, or improper mowing. The key to fixing it is identifying the specific cause. Drought stress and dormancy are the most common reasons in Oklahoma, but fungal diseases and grub damage are also frequent culprits. Complete Lawn Care has diagnosed and treated brown lawns across the Tulsa area for 25 years. We’ve seen every cause and know exactly how to bring lawns back to health.
Drought Stress: The Most Common Cause
What it looks like: Grass turns dull blue-gray before going brown. Footprints remain visible long after you walk across the lawn. Browning often starts in the hottest, driest areas first.
Why it happens: Oklahoma summers are brutal. When grass doesn’t get enough water, it shuts down to conserve moisture.
The fix: Water deeply (1 inch per week) early in the morning. If drought restrictions prevent adequate watering, the grass may go dormant but should recover when conditions improve.
Natural Dormancy
What it looks like: The entire lawn turns uniformly brown, typically in late fall (Bermuda/Zoysia) or during summer stress (Fescue).
Why it happens: Warm-season grasses go dormant when temperatures drop below 55°F consistently. Cool-season grasses like fescue may go semi-dormant during Oklahoma’s hot summers.
The fix: Nothing, this is normal. The grass isn’t dead, just sleeping. It will green up when temperatures return to its preferred range.
Fungal Disease
What it looks like: Circular patches of brown grass, often with distinct borders. Brown patch disease creates rings with tan centers and dark outer edges. Dollar spot shows small, silver-dollar-sized dead spots.
Why it happens: Fungal diseases thrive in humid conditions, especially with evening watering that leaves grass wet overnight.
The fix: Improve air circulation by not overwatering. Water in the early morning so the grass dries quickly. Fungicide applications may be needed for severe cases. Reduce nitrogen fertilization during outbreaks.
Grub Damage
What it looks like: Irregular brown patches that feel spongy underfoot. The grass pulls up easily like loose carpet because grubs have eaten the roots. You may also notice increased bird, skunk, or armadillo activity digging for grubs.
Why it happens: White grubs (beetle larvae) feed on grass roots from late summer through fall.
The fix: Apply grub control products, ideally preventatively in early summer before damage occurs. Curative treatments can help if applied early enough in the grub lifecycle.
Improper Mowing (Scalping)
What it looks like: Brown tips on grass blades immediately after mowing, or patches where grass was cut too short, often on high spots or uneven terrain.
Why it happens: Removing more than 1/3 of the grass blade at once shocks the plant. Mowing too short exposes stems and soil to scorching sun.
The fix: Follow the 1/3 rule. Raise your mowing height, especially in summer. Mow more frequently rather than letting grass get too tall between cuts.
Other Common Causes
Dog urine: Creates small circular brown spots with dark green edges from nitrogen concentration.
Fertilizer burn: Over-application or spills create brown streaks or spots. Usually follows the pattern of application.
Soil compaction: High-traffic areas turn brown because compacted soil prevents water and air from reaching roots.
Thatch buildup: Excessive thatch prevents water from reaching soil, causing drought stress even when you’re watering.
Complete Lawn Care Can Diagnose Your Brown Lawn
After 25 years serving the Tulsa area, Complete Lawn Care has seen every cause of brown lawns. We can quickly identify whether your problem is drought, disease, pests, or something else entirely. Our 7-step program addresses the most common causes of lawn decline, and we can recommend additional treatments for specific problems like grub damage or fungal disease. Don’t guess at the solution. Contact us for an expert diagnosis and a plan to restore your lawn’s health.
Contact Complete Lawn. Care:
Phone: (918) 605-4646 | Email: [email protected] | Online: completelawncaretulsa.com/get-a-quote