Said It Here

Why is my grass getting bright lime green patches?

Bright green patches appear in lawns when certain fast-growing grass types or invasive weeds take over a section of the yard. This stark color difference makes the lawn look uneven and disrupts its uniform appearance.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

  1. 1
    Applying glyphosate to kill the weed patches
  2. 2
    Treating the lawn with pre-emergent herbicide in the fall
  3. 3
    Learning to live with the patches

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.

r/lawncare2 people · September 2026

my grass, it's starting to get these patches of lime green.source ↗

chabbits · r/lawncare · 20 upvotes

I get that too in one corner of the yard. It appears like regular grass, just... like bright green in color.source ↗

PoisonGravy · r/lawncare · 1 upvotes

Where this came up

People with this problem also raised