Spring is in full swing, and turfgrass is starting to grow rapidly. At PJC Organic, we live by the phrase: “Mow High – May, June, and July.” It’s not just a catchy slogan — it’s a foundational cultural practice for organic turf care success.
Let’s explore why mowing height matters and how it can make or break your turf management program.
Why Mowing Height Matters
There is a direct relationship between the height of turfgrass and the depth of its root system. Lawns maintained at 3 inches or higher develop more robust roots than those cut at 1.5 inches. Stronger roots make your lawn:
- More drought-tolerant
- More resistant to grub damage
- More competitive against weeds
Backed by Research: Mow High for Grub Resistance
According to a study by the Michigan State University Extension: “Raising the mowing height results in a large increase in root mass… A larger root system lessens the chance of damage by grubs that feed on these roots.”
The research shows that turf with a dense root system can survive grub pressure without noticeable damage. Setting your mower height to 3.5 inches allows turf to:
- Develop deeper roots
- Survive grub feeding without dead patches
- Avoid the need for chemical insecticides
Combined with appropriate watering, mowing high significantly reduces the risk of pest-related turf damage — naturally.
Top Benefits of Mowing High
Here’s why mowing high is one of the most effective organic lawn care practices:
✅ Deeper Root Systems: Improves drought tolerance and nutrient uptake.
✅ Better Pest Resistance: Thick roots reduce grub damage naturally.
✅ Weed Suppression: Taller grass shades the soil, preventing weed germination (especially crabgrass).
✅ Cooler Soil Temperatures: Helps soil retain moisture and reduces stress.
✅ Improved Photosynthesis: More blade surface means more energy production.
✅ Less Frequent Mowing: When following the 1/3 rule, taller grass requires fewer cuts.
✅ Overall Lawn Resilience: Healthier turf means fewer issues and less chemical intervention.
Mow High = Fewer Chemicals, Safer Lawns
Organic turf care focuses on reducing reliance on synthetic herbicides and pesticides. Mowing high is a simple, sustainable way to:
- Keep lawns healthy and green
- Reduce pest pressure naturally
- Protect waterways, children, pets, and athletes from harmful chemicals
So this season, remember: “Mow High – May, June, and July” — and beyond!
Need Help Building an Organic Program?
PJC Organic supports landscapers and property managers with:
- Custom soil testing
- Organic lawn care products
- Organic Turf Care program development
- Expert guidance and education
📩 Contact us to learn how to build a chemical-free turf care program your clients will love.
