Horticultural Alliance offers innovative, solution driven products to strengthen the business of our customers in the landscape, arbor, nursery and agricultural markets.

Put our 20+ years of experience, research and advancement to work for you. All DIEHARD(TM) plant and soil amendment products contain core ingredients like Mycorrhizae, beneficial bacteria and biostimulants to significantly boost nutrient uptake and plant vitality.

Strength from within. Learn more or shop now!

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