Soil & Feeding
Lime for Northern Lawns: When and How Much
Lime fixes acid soil. It doesn't fix every thin lawn. How to tell if your lawn needs it, calcitic vs. dolomitic, how much to put down at once, and why fall is…
How to Read and Act on a Professional Soil Test Report for Your Lawn
Jack · golf course superintendent·1 min read·August 22, 2026
How to Read and Act on a Professional Soil Test Report for Your Lawn
Most homeowners fertilize blind. A professional soil test from a lab like the University of Illinois or a private service removes the guesswork and saves money while protecting the environment.
Key Numbers to Understand
- pH: Ideal 6.0-7.0 for most cool-season grasses. Below 6.0 needs lime.
- Phosphorus (P) and Potassium (K): Many established lawns are high in P; don’t add more unless the test says so.
- Organic Matter: Aim for 3-5%+ in the top few inches.
- Cation Exchange Capacity (CEC): Tells you how well the soil holds nutrients.
Pro Tip: Always get a “buffer pH” test if your pH is low. It tells you how much lime is actually needed, not just the current pH.
What to Do With the Results
Follow the lab’s recommendations exactly for the first year. Re-test every 2-3 years. Focus on building organic matter and correcting pH before chasing N-P-K numbers.
Related: pH Management • Compost Topdressing • Building a Professional-Grade Fertility Program
Photo by jarmoluk on Pixabay.
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