The Organic Approach to Plant Health and Excellence...

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We manufacture DIEHARDTM brand, high quality, organic amendments
and soil conditioners.


ALL DIEHARD™ products contain CORE Ingredients of beneficial fungus of Mycorrhiza fungus and Trichoderma fungus, beneficial bacteria, biostimulants of humic acid, sea kelp and yucca; and many contain a horticultural water gel for water and nutrient uptake.

Products are formulated for PLANT INSTALLATIONS, MAINTENANCE
or CURATIVE APPLICATIONS.

Complete satisfaction with all products from Horticultural Alliance, Inc. is guaranteed.




Proven Products for Gardeners, Landscapers & Growers

Products for Landscaping

Products for Maintenance

Products for Agriculture
Products for Nurseries

Products for Forestry
Products for Turf
Products for Arborists
Raw Materials

SPECIAL PRODUCTS & SOLUTIONS

Horticultural Alliance has formats for private label marketing, like Direct Shippers and is the only "One-Stop Solution" for Landscape Architects.

Solutions for Landscape Architects
As a Landscape Architect you know that client loyalty is built on results. And Results Matter! Results come from the company that wrote the book and set the standards in the industry. We offer the most complete products for the professional landscape trade in the world.
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Private Label DIEHARDTM Transplant
Include DIEHARDTM Transplant with your plant shipments. Private Labeling is available in your own company business theme, design and bag size, i.e. a 1-2 oz. bag. Your Private Label maintains a close connection to the excellence provided to your satisfied customer through your other products and services.
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Most Popular Products 

DIEHARDTM Transplant
Transplant amendment for trees and shrubs containing mycorrhizal inoculant compounds. Since 1997, has become the industry standard...
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DIEHARDTM BioRush®
Dry, soluble biostimulant compound applied as a foliar, drench or root injection to turf, trees, shrubs, fruit, nut and vineyards to boost plant...
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Horta-Sorb®
Horta-Sorb® , the highest quality super absorbent on the market today, is used in containers to hold water and nutrients in the root zone...
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Fruit & Nut Applications
Soil conditions during early stages of citrus tree establishment are crucial to producing high-yield groves. Of all the advances made in groves...
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