Fix brown patches on grass lawn with this step by step guide. Several factors can contribute to brown patches in a lawn. Dog urine, improper mowing, buried debris and soil compaction can all cause brown spots. Tree roots may also pose a problem if they are competing with grass for nutrients. Even sun reflecting off of the home’s wall will provoke loss of moisture and kill grass. If your green expanse is threatened by unattractive brown spots, use some simple fixes to get your lawn looking its best.
7 Conduct a pH soil test on your brown patches to make sure that the area is getting enough nutrients. You can purchase one at a gardening supply store. Remove the grass if the brown spot is caused by a tree root. This problem can't be fixed, but you can replace the spot with mulch.
Look to see whether the brown patch is in an uneven area of your yard. Scalping occurs when the mower runs over areas that are a different height from the rest of the yard, which causes the excessive grass loss. Raise the mower blade when mowing this area.