Lawn Problems
Brown grass in your lawn is frustrating, especially when you're putting time and money into maintaining it. The problem is that "brown grass" can mean six different things, and the fix for each one is completely different. Treating grub damage like heat stress won't work — and vice versa.
Here's how to diagnose what's actually happening and what to do about it.
Uniform browning across the whole lawn, especially during dry stretches in July and August. The grass turns brown evenly, not in patches. This is the most common cause in Southwest Michigan during hot summers.
Cool-season grasses like Kentucky bluegrass go dormant during hot, dry periods as a survival mechanism. The grass isn't dead — it's sleeping. It will green back up when temperatures drop and rain returns.
Deep, infrequent watering is better than frequent shallow watering. One inch of water per week, applied twice a week, is the target. If you're watering daily with light applications, the roots stay shallow and the grass is more vulnerable to heat. Raise your mowing height in summer — longer grass shades the soil and loses less moisture.
Irregular dead patches that you can pull back like loose carpet. The grass underneath has no roots — they've been eaten. You might see birds, skunks, or raccoons digging in the same spots (they're hunting grubs).
White grubs (Japanese beetle larvae and others) live in the soil and feed on grass roots through summer and fall. In Southwest Michigan, grub populations peak in late summer. Heavy infestations cause large sections of lawn to die off.
For active infestations, a curative grub treatment applied in late summer can help. Prevention is better — apply a preventive grub control product in June or early July, before eggs hatch. Affected areas will need overseeding once the grubs are addressed.
Brown patches with irregular edges, sometimes with a ring pattern. The patches may have a grayish or reddish tint. Common in hot, humid Michigan summers when conditions are wet overnight.
Lawn diseases like Brown Patch, Dollar Spot, and Red Thread thrive in humid conditions with poor air circulation. Overwatering at night, thick thatch, and compacted soil all make it worse.
Water in the morning so leaves dry before nightfall. Avoid overwatering. Improve drainage if the affected area stays wet. Fungicide applications can stop active outbreaks. Aerating to reduce compaction and dethatching to improve air circulation help prevent recurrence.
Streaks or patches of brown that often follow a pattern — along mower lines, in strips, or wherever fertilizer was applied unevenly or spilled. Appears within days of a fertilizer application.
Water deeply and immediately to flush excess fertilizer through the soil. Affected areas may come back on their own. Severely burned spots may need overseeding. Always apply fertilizer at the recommended rate and use a calibrated spreader.
Small, round brown spots — often with a green ring around the edge (the diluted urine actually acts as fertilizer at the edges). Usually scattered and appear repeatedly in the same areas.
Flush the area with water immediately after a dog uses it to dilute the nitrogen concentration. Reseed affected spots. Some homeowners designate a gravel or mulch area for dogs to reduce damage to lawn areas.
Tips of grass blades turn brown or gray shortly after mowing. The lawn looks dull and stressed even after a fresh cut. Often worse in summer heat.
A dull mower blade tears grass instead of cutting it cleanly. The ragged edges turn brown as the plant tries to heal. Cutting too short ("scalping") also causes browning by removing too much of the blade at once.
Sharpen mower blades at the start of each season and mid-season if you're mowing frequently. Never cut more than one-third of the grass blade in a single mow. Keep the height at 3 to 3.5 inches during summer.
🔍 Still not sure? If you're in the Niles, MI area and can't figure out what's happening with your lawn, give Leaf-Les Lawncare a call. We can take a look and tell you what's actually going on — no charge for the assessment.
We serve Niles, Buchanan, Berrien Springs, Dowagiac, Cassopolis, and Edwardsburg, MI. Free assessments and estimates.
Get in Touch →