PINELLAS COUNTY, FLORIDA - Helpful information about Pinellas lawns & landscapes.

Blazing Hot Florida Sun can Scald the Turf leaving Brown Streaks in the Lawn

Sun Scald on St Augustine grass Caused by Mowers
Sun Scald on St Augustine Caused By Mower

Scald occurs when the leaf temperature reach the max temperature the plant can withstand - then cell walls break down, organelles stop functioning and the leaf blade dies. The most common occurrence of "sun scald" on St Augustine turf is during hot dry weather when mowers with hot tires, travel across a hot lawn on a hot day and cause scald. The grass will recover but it takes time.

Sun Scald on St Augustine Grass From Extreme Heat

Sun scald can appear as a "pock marked lawn" with small 6" circular areas of live grass in a larger area of tan/dead turf in sunny spots in the lawn. These areas will recover when there is adequate moisture and cooler temperatures.


The solution is to keep the turf cool by keeping the soil moisture at medium levels (field capacity). The evaporation of water from surfaces and evapo-transpiration processes of plants cool the plant down. No water – the grass overheats and dies.

Tip: A cooling midday watering can help – it is a myth that watering during the middle of the day damages grass or is a waste of water. A light sprinkle of water on the lawn is like jumping into a pool for the lawn – it cools and refreshes. Also, if possible mow during the cooler times of the day and mow at the highest setting on your mower.

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Article by Rick Orr
APL Lawn Spraying Inc.

Rick Orr is the creator of, an Agronomist and the Owner/Operator of APL Lawn Spraying. Rick is a graduate from VA Tech in Agronomy (Turf Ecology). He has been a Golf Course Superintendent, Certified Arborist, Landscape Contractor, Irrigation Contractor and Adjunct Professor for Environmental Horticulture.

Rick is an expert at growing St Augustine turf. Since 1995, Rick has spent his time researching, developing and testing the best management practices for St Augustine turf grown in Pinellas County.

The results of that work is a one of the top rated lawn spray companies in Pinellas County – APL Lawn Spraying. APL Lawn Spraying is a family owned business serving residential and commercial properties in Pinellas County, FL.

APL Lawn Spraying provides lawn spraying to commercial properties, HOA’s and single family homes. To request a free quote for your property, click here: Free Advice or Price Quote

Speaking Engagments - 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. Call or email for more information.

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