You Should Mow Your St Augustine Lawn at 4" and Here's Why


By Rick Orr 04/17/2020
Cross section of a St Augustine lawn showing mowing height of 4?
Side view of a St Augustine lawn showing the correct mowing height.

Mow St Augustine Turf Grass Lawns at 4" or Higher

When you mow a St Augustine lawn at three inches or higher you create a tall thick canopy of grass above the soil. The taller and thicker the better. Why?

Best at Food Production

A tall canopy intercepts the maximum amount of sunlight to produce the maximum amount of food (photosynthesis).  The more food, the more energy for growth, recovery, and strength during stress like drought, disease, and pests.

Protection from Heat and Drought

Nothing insulates better than a tall thick canopy of grass. The tall canopy blocks the sun, shades stems and roots and keeps the temperature and humidity perfect for growing grass.

An Organic Weed Barrier

The tall canopy is a weed barrier and weed blocker. The tall canopy prevents weeds from reaching the soil to germinate. Those weed seeds that do germinate will perish from lack of sunlight.


The rigid blades of St Augustine grow uniformly erect, rigid and close together. This gives the St Augustine lawn a "billiard table" look even when the grass is six inches high.

Mowing A St Augustine Lawn at 4" or Higher is Best

Some think that the lawn should be mowed low. If you mow below three inches, you give up food production, insulation, weed control and appearance. You can brag about how low you mow, but you can't brag about how good your lawn looks. And why grow a lawn if it doesn't look good?

So if you want a lawn to brag about, stop fighting the temptations to mow it low and let it grow. It will look great and thrive even during blistering heat and drought.

Rick Orr Owner-Operator APL Pest Control/Creator of ILOVETURF.COM
APL Pest Control

Rick Orr is the creator of, Owner/Operator of APL Pest Control, and a graduate of VA Tech in Agronomy (Turf Ecology).  

Since 1980, Rick worked in the green industry, mostly with golf courses, resorts, and large communities. Rick worked as a Golf Course Superintendent of Fripp Island Resort, agronomist for Seaside, FL, and the spray tech for Vinoy Golf Course. Rick has been certified as an arborist, landscape and irrigation contractor, and adjunct professor for Environmental Horticulture (SPC) in Pinellas County.  

Home Pest Control came naturally. Entomology (bug science) was part of agronomy studies. Nearly every indoor pest problem starts outdoors. Crossing over to home pest control from lawn spraying was a natural process – the technology, methods, and materials used for home pest control are modifications of the ones used for lawn spraying. 

The result of that work is one of the top-rated pest control companies in Pinellas County – APL Pest Control. APL Pest Control is a family-owned business serving residential and commercial properties in Pinellas County, FL. 

Free Price Quote for Home Pest Control and/or Lawn Care CLICK HERE

To learn more about APL Pest Control CLICK HERE

Speaking Engagements - Does it seem like you are only hearing one side of water restrictions, fertilizer bans, plant restrictions, and many other urban landscape hot topics? Rick Orr is available for speaking engagements for your HOA, Community or Professional Association, or Garden Club about a variety of subjects. To contact Rick you can find him on FacebookTwitterLinkedIn, and Instagram for booking information.