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Harrell's Launches Bio-MAX® 4-0-1 A+E and ProtectMAX® Sulfentrazone

Published on 10/14/2026
Harrell's products

Advanced plant health support and dependable weed control for turf managers seeking stronger performance throughout the growing season.

LAKELAND, FL — Harrell's is pleased to announce the launch of two new additions to its growing lineup of turf management solutions: Bio-MAX® 4-0-1 A+E, an advanced foliar nutritional and biostimulant, and Harrell’s ProtectMAX® Sulfentrazone, a versatile herbicide designed to provide fast, effective control of sedges and broadleaf weeds.

Together, these new offerings reinforce Harrell's commitment to providing turf professionals with practical solutions that support both plant performance and program success.

Bio-MAX 4-0-1 A+E: Advanced Nutrition Meets Biostimulant Technology

Bio-MAX 4-0-1 A+E combines the proven performance of Bio-MAX 4-0-0 with the benefits of Seaweed A+E technology in a single application. The formulation delivers stabilized nitrogen, iron, manganese, and potassium along with a proprietary blend of Ascophyllum nodosum and Ecklonia maxima seaweed extracts designed to support plant vigor, root development, and stress management.

"Today's turf managers are looking for products that deliver more value in every application," said Dr. Raymond Snyder, Harrell’s Director of Agronomy. "Bio-MAX 4-0-1 A+E provides nutritional support and biostimulant benefits in one convenient solution, helping turf perform through stress while supporting overall plant health."

ProtectMAX Sulfentrazone: Fast, Flexible Weed Control

ProtectMAX Sulfentrazone is a Group 14 herbicide containing 4 pounds active ingredient per gallon, formulated to control sedges and a broad spectrum of troublesome broadleaf weeds in both cool-season and warm-season turf. The product is labeled for use across a wide range of sites, including residential and non-residential turf, athletic fields, golf courses, sod farms, and ornamental production areas.

Known for its fast visual activity and efficacy on both broadleaf and sedge weeds, ProtectMAX Sulfentrazone offers turf managers a flexible tool that fits seamlessly into comprehensive weed management programs. The product can be used as a stand-alone application or as a tank-mix partner to enhance the performance and speed of symptom development when used with standard herbicide programs.

"Harrell’s ProtectMAX Sulfentrazone gives turf professionals another dependable option for managing some of the most difficult weed challenges they face," said Dr. Jeff Atkinson, Harrell’s Director of Agronomy. "Its versatility, speed of activity, and program fit make it a valuable addition to any weed control strategy."

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Growing a Better World

The launch of Bio-MAX 4-0-1 A+E and Harrell’s ProtectMAX Sulfentrazone reflects Harrell's ongoing focus on developing practical, proven solutions that help customers produce healthier turf, improve consistency, and achieve better results.

For more information about these or other Harrell's products, visit Harrells.com or reach out to your local Harrell's Rep at harrells.com/findrep.


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