Brown patches are the most soul crushing sight for anyone who loves their lawn, but they are usually fixable. This guide helps you diagnose the cause, perform quick triage, pick the right seed, and reseed or repair so the brown does not return. The advice covers pests, fungi, scalping, pet damage and bare spots, with practical steps you can do this weekend.

Quick Diagnosis For Brown Patches

Start with observation. Walk the lawn early in the morning when any dew makes symptoms clearer. Look for chewed blades, moths or birds feeding, tunnelling and soft spongy turf that suggests grubs, or circular rings that point to fungal activity. Take a hand trowel and check the roots; grub damage will leave roots chewed and turf that pulls up easily. Fungal diseases often show a distinct margin of stressed grass and can have spores or discoloured leaf tissue.

Use the dish soap test for grubs by mixing a tablespoon of dish soap in a litre of water and pouring it over a 1 m square area. If grubs come to the surface within 10 minutes you likely have a current grub infestation. Note the patch shape and whether it changes overnight, this gives clues about pests versus cultural issues.

Inspection Tip: Lift a square of turf and inspect roots for chewing and brown rot. Healthy roots should be white and firm, not mushy or eaten away.

Common Causes And How To Tell Them Apart

Pests such as armyworm and curl grubs chew and remove leaf tissue leaving ragged or stripped patches, often with birds feeding on the surface. Fungi like brown patch and dollar spot create circular or irregular brown lesions and can appear after heavy dew or poor air flow. Scalping or mowing too short shaves crowns and shows up as sudden brown stripes or a general browned lawn after a recent low mow.

Drought or hydrophobic soil causes uniform wilting and browning that recovers quickly after deep watering if roots are intact. Pet urine usually creates small, very brown or yellow patches with sharply defined edges. Compaction makes the turf thin and then brown, often in high traffic areas.

Emergency Fixes You Can Do Today

If the patch is expanding, take quick actions to slow damage. Raise your mower height to avoid further scalping, water deeply if drought is suspected, and lightly rake to remove surface thatch so fungicide or water can reach soils. For suspected grubs limit irrigation and consider a targeted insecticide following label directions. For obvious fungal hotspots improve air flow, reduce late afternoon watering and apply a labelled fungicide if the problem is severe.

For small bare spots lift the turf edges, remove dead material, loosen the soil, and reseed or patch with a small piece of sod. Avoid overreacting with blanket chemical sprays until you are confident about the diagnosis, because some products are ineffective for particular pests or fungi.

See our page on Reviving Dead Grass for a full step by step rescue plan including when to lift and replace turf and when to reseed.

Climate Tip: Check your local Bureau of Meteorology climate zone before selecting grass seed. What works in Perth may not thrive in Brisbane due to humidity and rainfall differences.

Reseeding Decisions By Season And Grass Type

Decide first if your lawn is a cool season or warm season turf. Cool season lawns recover best in autumn and early spring when soils are cool and moist, while warm season lawns are best sown from mid spring once soils warm. Warm-season sowing normally begins in mid spring so seedlings can take advantage of rising temperatures. If you are repairing in cool months stick to cool season options.

For cool season patches consider deep rooted, durable choices. RTF Tall Fescue has deep roots that provide drought resilience and is excellent for family lawns. Elite Backyard Blend is a good pick for mixed conditions with quick establishment and wear tolerance. For high traffic areas or quick recovery try Sports Turf Perennial Ryegrass. If you have a cooler, shaded lawn consider Kentucky Bluegrass which handles shade and cold well.

For warm season lawns the classic choice is Bermuda Couch Grass, which establishes quickly in summer heat and tolerates wear. If you want fast green while couch establishes consider a Bermuda Couch Blend which usually includes annual ryegrass for quick temporary colour. If shade is an issue among warm season choices, Zenith Zoysia germinates slowly but is one of the more shade tolerant warm season grasses. Remember Zenith Zoysia germinates slowly so expect patience.

Step By Step Reseeding And Patch Repair

1. Remove dead grass and loosen the top 20 mm of soil. 2. Add 5 to 10 mm of screened topsoil or compost and rake level. 3. Choose seed suited to the season and sun. 4. Apply seed at the recommended rate and press gently so seed contacts soil. 5. Keep the patch moist with light sprinklings until germination then gradually reduce frequency while increasing depth.

If you need quick green cover on a winter bare patch, see our page on Plant Annual Ryegrass for timing and tips. For purchasing options consider our Annual Ryegrass Seed when you need a short term, fast cover solution for sports or events.

Overseeding Tip: Don’t overseed into a heavy thatch layer. If thatch is more than 10 mm aerate first and remove excess material so seed can reach soil.

Shade And Special Situation Recommendations

For heavy shade the cool season leader is Creeping Red Fescue, followed by Elite Backyard Blend and RTF Tall Fescue. Technical reason is efficient light capture and cooler soil tolerance which helps these grasses photosynthesise in low light. Kentucky Bluegrass also copes with partial shade and can be used where cool season turf is preferred. For warm season partial shade options, consider Zenith Zoysia as the most shade tolerant warm season option and Buffalo Grass for lower maintenance partial shade.

Keep edges trimmed and thin trees if possible to improve light and air flow, because shade combined with moisture encourages fungal disease.

Pet Damage And Urine Spots

Urine spots happen when nitrogen salts burn grass tissue. For small or fresh spots water immediately with a litre or two to dilute salts. Reseed with tolerant varieties for frequent pet use, and consider training pets to a specific area. If urine is a recurrent issue use a watering schedule and apply small amounts after pet visits to dilute concentration.

For severe or repeated pet damage consider a mixed lawn with clover, such as white clover, to boost durability and nitrogen buffering. See our Lawn FAQs for extra product and maintenance guidance relevant to pets and kids.

When To Call A Professional

Call a pro when brown patches are widespread, when you see rapid expansion despite good care, or when the diagnosis is unclear after simple checks. Professionals can test soil, identify fungal species or pests correctly, and recommend specific fungicide or insecticide solutions. For complicated grub or armyworm outbreaks targeted chemical control is often needed and a pro can apply it safely.

Our team of lawn experts are available online, by phone (1300 703 491) or email (customersupport@mckaysgrassseeds.com.au) all day to assist with customer enquiries. This is what they do all day, every day.

Remember Western Australia cannot receive any products from us, and Tasmania cannot receive RTF Tall Fescue due to shipping restrictions. Use the seed selection tool on our site to match your climate and lawn use, and contact us if you are unsure.

Practical Maintenance To Prevent Brown Patches

Good routine reduces disease and pest pressure. Aerate compacted areas annually, keep mowing height appropriate for your species, and water deeply and infrequently to encourage roots. Avoid late afternoon watering that leaves foliage wet overnight and favours fungal disease. Remove excess thatch and avoid overfertilising with high nitrogen in wet seasons.

For warm season turf remember that spring is the time for renovation and sowing once soils warm. For cool season species plan major overseeding in cooler months when soil temperatures favour germination. If your lawn is a mix of warm and cool species pick the dominant type or renovate to a single species for consistent care.