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Harrell’s EarthMAX is a unique soil additive designed to promote maximum soil and plant health in turf and ornamental programs.
Learn about nitrogen's role as a major nutrient from plant and soil expert Lynn Griffith!
Spider mites come in a variety of shapes and sizes, but they all have one thing in common: they’re bad news for plants.
Nematodes are unsegmented roundworms that live just about everywhere on Earth, but some varieties can cause problems for growers and turf managers.
Plants aren't able to think the way we are, but that doesn't mean they're helpless.
This course covers common nutrient deficiencies in plants.
Learn about coir as a media component in potting mixes
Learn about water quality and how it impacts plants and soil.
In this learning course, Lynn Griffith discusses the primary nutrient Phosphorus and how it relates to horticulture.
Learn Techniques for Taking Soil & Tissue Samples for Testing!
Ever noticed that plants respond better to rain water than to irrigation water?
This course describes how soluble salts impact fertilizers and plants.
The following CEU-credited courses are available to myHarrell's customers.
Core aerification explained!
Learn how Bicarbonates affect soil and plant health
This learning course by Lynn Griffith covers the important nutrients involved in growing roses.
Learn about boron's function in plants, and how to check for (and correct) deficiency and toxicity situations.
If you are considering a golf course renovation, allow us to at least show you what a Polyon grow-in program can do!
Turf & Landscape
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Discusses Harrell's Core Values
on April 26 by Rick Helpingstine
Applying silicon is a practical and economical way to make container plants stronger and more insect, disease and stress resistant.
on April 19 by Campbell Cox
in Aerification, Disease, Golf
Here's some really useful information worth sharing from the recent Clemson University field day in Florence, SC.