When it comes to lawn care, many homeowners focus on regular mowing, watering, and fertilizing. But did you know that the health of your soil is just as important? Two products often overlooked — lime and gypsum — can make a huge difference, especially if you’re dealing with acidic soil or heavy clay. If you’re unfamiliar with these beneficial lawn products, don’t worry! Let’s break down how lime and gypsum can help you grow a greener, healthier yard.

Why Lime Is Good for Your Lawn

Lime isn’t just for cocktails! In lawn care, lime is a soil amendment that raises the pH of acidic soils, making them less sour and more balanced. Many lawns, especially in areas with a lot of rain, trees or older landscapes can suffer from acidic soil. Acidic soil blocks the uptake of essential nutrients even when you are applying fertilizer. This can leave your grass looking yellow, thin, or patchy.

How Does Lime Help?
Lime (made from crushed limestone) works by neutralizing acidity, bringing the soil closer to a balanced pH. When the soil pH is in the right range—typically between 6.0 and 7.0—your grass can better absorb nutrients like nitrogen, phosphorus, potassium, and trace elements. This helps your lawn thrive, giving it that lush, green appearance everyone loves.

When Should You Apply Lime?
The best time to apply lime is in the fall or early spring. Fall applications are ideal because the lime has time to break down over winter, preparing your lawn for new growth in the spring. Just sprinkle it evenly across your yard, water it in, and let it do its magic! You’ll start seeing improvements in just a few months. An added benefit by adding lime in the fall you’ll also be helping keep down moss growth over the winter.

Lee’s tip: If you spread lime on your lawn in spring, one week before your planned fertilizer, and find that your lawn suddenly greens up, this is a great indicator that you have low-pH soil.

Got Heavy Clay? Here’s Why Gypsum Is Your Best Friend

If your yard has heavy, compacted slippery clay soil, it can feel like a losing battle trying to grow anything—grass included. Clay soil holds onto water, leading to drainage issues, root rot, and a muddy mess. This is where gypsum (calcium sulfate) steps in to save the day.

What Does Gypsum Do for Clay Soil?
Gypsum works by breaking up compacted clay particles, improving soil structure and drainage. Think of it as a conditioner for your soil—making it softer and more porous, so water can move freely and roots can grow without restrictions. Gypsum is especially helpful if you’ve struggled with standing water or your lawn feels hard and compact underfoot.

Lee’s science moment: It’s fascinating how gypsum works to break apart clay soil. Both gypsum and clay are made up of negatively charged ions. As science tells us, two negatives will push against each other thus causing the clay soil to break apart, allowing for a looser bond. The looser soil now allows for both water and nutrients to be more accessible to your plants (grass is a plant).

The Added Bonus of Calcium
Gypsum also adds calcium to your soil without changing its pH. This makes it a great option if your soil needs calcium but isn’t too acidic. Calcium strengthens grass cell walls, promoting healthier growth and making your lawn more resistant to stress from heat and drought.

How to Apply Gypsum
Applying gypsum is simple. Like lime, it’s best applied in the fall or early spring. You can spread it across your lawn with a broadcast spreader and water it in. Over time, you’ll notice your soil becoming easier to work with, and your lawn will respond with stronger roots and better overall health.

Lee’s Note: gypsum should be applied at least annually in a clay soil environment.

Lime or Gypsum—Which One Should You Use?

Both lime and gypsum offer fantastic benefits, but they’re designed for different situations. If your soil is too acidic, lime is the way to go. If you’re dealing with heavy, compacted clay, gypsum will help improve drainage and soil structure. In some cases, your lawn might even benefit from both!

If you’re not sure which product your lawn needs, it’s a good idea to start with a soil test. Many garden centers or local extension offices offer inexpensive soil tests that tell you your pH and soil composition. This will give you a clear picture of what your lawn needs to reach its full potential.

Lee’s advice: you can also look into buying your own pH tester. They are not that expensive.

Conclusion: Give Your Lawn Some Extra Love with Lime and Gypsum

Taking care of your lawn doesn’t have to be complicated, and using the right soil amendments can make all the difference. Lime helps your grass access nutrients by balancing soil pH, while gypsum breaks up heavy clay, improving drainage and root growth. Both are easy to apply, and when used correctly, they’ll help you achieve the beautiful, healthy lawn you’ve been dreaming of.

So, if your grass looks like it could use a little help, don’t be afraid to try lime or gypsum. Your lawn will thank you!