If your lawn feels soft, springy, or almost like you’re walking on a sponge, you’re not imagining it. While a little cushioning is perfectly normal, an unusually spongy lawn is often a sign that something is happening just below the surface.
Fortunately, the problem is usually correctable once you understand what’s causing it.
The Most Common Cause Is Excess Thatch
The number one reason a lawn feels spongy is a thick layer of thatch.
Thatch is made up of partially decomposed grass stems, roots, and other organic material that collects between the green grass and the soil. A thin layer of thatch is actually beneficial because it helps insulate the soil and retain moisture.
When that layer becomes too thick, however, it acts like a sponge beneath your feet.
Too Much Thatch Creates Problems
An excessive thatch layer doesn’t just change how the lawn feels.
It can prevent water, oxygen, and nutrients from reaching the soil where the grass roots need them most. Grass roots may begin growing within the thatch itself instead of extending into the soil, making the lawn more vulnerable to drought, heat, and disease.
The result is a lawn that may look acceptable for a while but struggles whenever growing conditions become less than ideal.
Overwatering Can Make the Problem Worse
If the soil remains saturated for extended periods, your lawn may also feel softer than normal.
Poor drainage, excessive irrigation, or prolonged periods of heavy rain can all contribute to overly wet conditions. While Minnesota occasionally experiences these situations naturally, consistently wet soil can weaken turf and create additional lawn health problems.
A healthy lawn should feel firm while still having a little natural cushion.
Compacted Soil Can Contribute Too
It may seem surprising, but compacted soil and a spongy lawn often go hand in hand.
When soil becomes compacted, grass roots struggle to grow deeply. At the same time, thatch can accumulate near the surface because the natural breakdown process slows. The combination can leave the lawn feeling soft above while remaining dense and compacted below.
Core Aeration Is Often Part of the Solution
One of the best ways to improve overall lawn health is through professional core aeration.
By removing small plugs of soil, aeration allows air, water, and nutrients to penetrate more deeply into the root zone. It also encourages stronger root growth and creates better conditions for the natural breakdown of thatch over time.
While aeration doesn’t instantly eliminate a thick thatch layer, it’s one of the most effective long-term practices for maintaining a healthier lawn.
A Healthy Lawn Starts Below the Surface
It’s easy to focus on the color of the grass because that’s what you see every day.
But the real health of your lawn depends on what’s happening underground. Healthy soil, strong roots, proper fertilization, effective weed control, and periodic aeration all work together to create turf that’s dense, resilient, and comfortable to walk on without feeling excessively soft.
Let Turf Care MN Evaluate Your Lawn
If your lawn feels unusually spongy, don’t assume it’s just the way your grass grows. It may be telling you that your soil or thatch layer needs attention.
At Turf Care MN, we provide professional fertilization, weed control, core aeration, overseeding, and complete lawn care services throughout the Brainerd Lakes area. We’ll evaluate your lawn, identify the underlying cause, and recommend the best solution to help your grass become healthier from the roots up.
If you’ve been asking, “Why does my lawn feel spongy when I walk on it?” contact Turf Care MN today. We’d be happy to help you build a lawn that’s every bit as healthy as it looks.
