Subject: grass clipping Inquiry on 10/22/2025

Hello ,

Thank you for contacting the UNH Extension Infoline.

Following up on your inquiry about Grass clipping, we have compiled some valuable information to help you identify your worm findings.

Please reach out if you have any further questions.

Regards,
Haim
Master Gardener Volunteer
UNH Extension Infoline Team

General information: 

Instead of raking up and throwing away old grass clippings, it's best to use them to benefit your plants and soil. Tilling them is an option, but not always necessary. The ideal choice depends on the specific circumstances of your garden beds.

Rake and use as mulch

Raking the old clippings into a thin, even layer is the easiest and most beneficial option for your plants.

Retains moisture: A layer of grass mulch insulates the soil, helping it retain moisture and reducing the need for watering.

Suppresses weeds: It blocks sunlight, preventing new weeds from germinating.

Enriches soil: As the clippings continue to break down, they add valuable organic matter and nutrients like nitrogen and potassium to the soil.

Regulates soil temperature: The mulch helps keep the soil cooler in the summer and protects roots from temperature fluctuations

Till the clippings into the soil

You can till the old, dried grass clippings directly into garden beds, but use this method with caution around existing plants.

Improves soil structure: Tilling in organic matter can improve the soil's ability to retain water and nutrients.

Risk to existing plants: Rototilling can damage the roots of nearby plants, so it's only a safe option for prepping new beds or for open areas away from established vegetation.

Consider soil health: Some gardening experts prefer minimal tilling to preserve the soil's natural structure and ecosystem.

Rake and add to a compost pile

If you don't want to use the clippings around your plants, add them to a compost bin. Old, brown grass acts as a "brown" or carbon-rich material that helps balance out fresh "green" materials like food scraps.

What to avoid and what to consider: leaving in thick clumps ,This can mat down, block air and moisture from reaching the soil, and cause bad odors as it decomposes without oxygen. Raking and spreading the clippings is essential.