Dog Wee

Why Dog Wee Causes Brown Patches and how to fix them.

A lot of our customers have dogs and I often get asked what is causing the brown dead spots on the lawn. Dog urine contains very high levels of nitrogen and salts. In small amounts, nitrogen acts like fertiliser, but when a dog wees in one spot the nitrogen becomes so concentrated that it burns the grass. This is often more noticeable with female dogs because they tend to squat and wee in one place.

Dog Wee spots on a lawn

You’ll typically see brown or straw coloured patches where the grass has died, sometimes with a darker green ring around the outside where the nitrogen is less concentrated. If your dog uses the same favourite spot, the damage will repeat. The problem is worse in dry weather because there’s less moisture in the soil to dilute the urine, so the burn happens faster and more severely.

Dog Wee, dead grass in the middle and green ring on the outside.

Nutients in the dog wee makes the grass nice and green compaired to the rest of the lawn.

Dog Rocks & Water Additives

Many customers try Dog Rocks or water additives, but results vary and the grass often still burns. Products that claim to stop lawn damage by changing a dog’s urine aren’t reliably effective, and vets generally advise against them as they may upset a dog’s health.

How to Fix Dog Wee Patches

1. Rinse the area straight away (most effective).

A quick splash of water after your dog wees can stop the nitrogen from burning the grass. It’s simple and extremely effective.

2. Repair the damaged patches

Rake out the dead grass, fork the soil to open it up, water the area, apply seed, and topdress the patch. The key is keeping the area consistently moist — if it dries out, the seed will fail.

3. Improve soil moisture

Dry soil makes urine damage worse. Regular watering helps dilute the nitrogen and protects the grass.

4. Increase your dog’s water intake

More hydration means more diluted urine, which reduces the severity of burn marks.

5. Train your dog to wee in one area.

Create an area for them to wee away from the lawn.

6. Walk them more

Get the dogs out more so they don't wee on the lawn