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What are they, and how do they work? Take this short course to find out!
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 water quality and how it impacts plants and soil.
Learn about the five most economically destructive insects for southern turfgrass.
This course describes how soluble salts impact fertilizers and plants.
Learn how to control these destructive pests.
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.
Nematodes are unsegmented roundworms that live just about everywhere on Earth, but some varieties can cause problems for growers and turf managers.
Xylella can devastate plants. This course will get you up to speed on this disease.
The relationship between plant nutrition and disease is very complex
Spider mites come in a variety of shapes and sizes, but they all have one thing in common: they’re bad news for plants.
With Dr. Jeff Higgins
Phytophthora is truly a plant destroyer. Learn how to prevent, identify and control this destructive disease.
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.
Learn Techniques for Taking Soil & Tissue Samples for Testing!
The following CEU-credited courses are available to myHarrell's customers.
Learn about boron's function in plants, and how to check for (and correct) deficiency and toxicity situations.
Learn how Bicarbonates affect soil and plant health
Turf & Landscape
See how it works
Discusses Harrell's Core Values
on July 10 by Matt Gregg
in Golf, Sports Turf, Turf & Landscape
Harrell’s is pleased to announce the addition of Daniel S. Wilson and Mark Stovall to the Coastal Plains Turf team.
on June 27 by Matt Shook
in Special Interest, Specialty Agriculture
The Citrus Expo is one of Florida’s largest agriculture seminar and trade show events.