Thatch


Understanding Thatch & Its Impact
π What is Thatch?
Thatch is a layer of dead grass and decaying organic matter that accumulates at the soil level.
β οΈ Why is Thatch a Problem?
Excessive thatch traps moisture, creating a breeding ground for fungi, pests, and pathogens. It can also delay spring green-up by blocking new growth from emerging properly.
β Why Your Lawn Has Excessive Thatch?
Fertilizers stimulate growth, outpacing soil microorganisms' ability to break down and decompose.
Buildup - If zoysia is NOT detached occasionally, thatch can begin to accumulate.
Bad Mowing Habits β Mowing too high or infrequently is a significant contributing factor to thatch buildup.
Spring Low Mowing can help mitigate the buildup of thatch. Watch our video about the ideal Spring Lawn Care Routine.
Read our Blog Post about Proper Mowing Practices.
Soil Compaction inhibits the microorganisms from properly decomposing organic matter.
π± Are Grass Clippings Causing Thatch?
Yes & No... as long as proper mowing practices are maintained, grass clippings do not contribute to thatch. In fact, microorganisms break down clippings and return them as valuable nutrients to the soil.
However, if you are not following the advice laid out in our Blog Post about Proper Mowing Practices, your lawn can and will accumulate thatch.
Solutions for Thatch Build-Up
1οΈβ£ Dethatching
Light Thatch: Use a garden rake to gently remove thatch, minimizing stress for faster recovery.
Heavy Thatch: Requires a dethatching machine or vertical mower to pull thatch from the topsoil.
Timing: Perform dethatching after dormancy but before summer heat to prevent excessive stress on the grass.
2οΈβ£ Spring Low Mow ("Scalping") π±βοΈ
Lowers mowing height to remove dormant grass and encourage spring growth.
Bag clippings to prevent buildup.
β Best for: Bermuda & Zoysia
DO NOT scalp zoysia lower than 2.5 inches
β NOT recommended for: St. Augustine & Centipede
3οΈβ£ Core Aeration π¨
Improves air and moisture infiltration, boosting microorganism activity that naturally breaks down thatch.
Leave soil plugs on topβas they decompose, they return nutrients to the lawn.
Encourages stronger root growth and overall turf health.
π‘ For long-term thatch management, regular aeration is highly recommended!