Pros and Cons of Using Grass Clippings as Garden Mulch

A Frugal Gardener's Experiment

Seeking free, easy, effective mulch, I tried dried grass clippings from a neglected lawn. Applied 6–8 inches thick after weeding.

Pros

• Free/very cheap (no mowing cost).
• Easy to obtain and apply.
• Fairly effective at weed suppression.

Cons

• Didn't stop tough weeds (thistle, dandelion).
• Couldn't mulch between closely spaced crops (carrots, beets, beans).
• Grass compacted over summer, reducing air/water penetration and thinning the layer, allowing more weeds.

Additional Considerations

Benefits: Adds nitrogen, retains moisture, reduces rain impact, shelters beneficial insects.
Risk: Lawn chemicals (herbicides/pesticides) may contaminate clippings. Many herbicides kill broadleaf plants—your garden vegetables. Know your lawn treatment history before using clippings.