All DIEHARD™ plant, soil amendment products contain CORE ingredients:   Mycorrhiza fungus, Trichoderma fungi, beneficial bacteria, bio-stimulants of humic acid, sea kelp and yucca; and many contain a horticultural gel for water and nutrient uptake and management.

We offer solution driven products for the landscape, arbor, nursery and agricultural markets; backed with over 20 years of experience to produce the latest advancements in biological products to make your job easier and less costly.

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