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Learn about carbon's role in plant growth, and why it's such an important element for all living things.
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!
Phytophthora is truly a plant destroyer. Learn how to prevent, identify and control this destructive disease.
Nematodes are unsegmented roundworms that live just about everywhere on Earth, but some varieties can cause problems for growers and turf managers.
Spider mites come in a variety of shapes and sizes, but they all have one thing in common: they’re bad news for plants.
In this course, Tropical Plant and Soil Expert Lynn Griffith takes a look at the damage caused by flea beetles, and explains what you can do to keep them away from your plants.
What information is on a pesticide label, and why is it important?
Learn about Magnesium and how it impacts plant health!
In this learning course, Lynn Griffith discusses the primary nutrient phosphorus and how it relates to horticulture.
Learn about how plants cope with high temperatures.
Plants aren't able to think the way we are, but that doesn't mean they're helpless.
Learn about water quality and how it impacts plants and soil.
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.
If you are considering a golf course renovation, allow us to at least show you what a Polyon grow-in program can do!
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.
Turf & Landscape
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on October 17 by Mike Rupp
in Golf, Special Interest
If spending time outdoors is part of your livelihood or hobby, don't forget the dangers of ultraviolet radiation.
on October 10 by Matt Shook
in Specialty Agriculture
Florida's citrus industry was hit hard by Hurricane Irma. This press release outlines Governor Scott's plan for recovery.