The Organic Approach to Plant Health and Excellence...
Soil Amendments with Mycorrhizal Fungi, Root Inoculants from Horticultural Alliance


ALL DIEHARD™ soil conditioner products contain CORE Ingredients of: beneficial fungus - Mycorrhiza fungus and Trichoderma fungus; beneficial bacteria; bio-stimulants 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
Complete satisfaction with all products from Horticultural Alliance, Inc. is guaranteed.


Proven Soil Amendment Products with Mycorrhizal Fungi, Bio-Stimulants & Root Inoculants for Gardeners, Landscapers & Growers

soil amendments for landscaping with bio-stimulants
Products for Landscaping

bio stimulants & micorrhiza fungus for plant maintenance

Products for Maintenance

Agriculture, cirtusand fruit tree soil conditioner and root inoculants

Products for Agriculture
Organic Fertilizer products for nursery
Products for Nurseries

Root inoculants with bio-stimulants and mycorrhiza fungus for forestry

Products for Forestry
soil conditioner products for turf
Products for Turf
Raw material with bio-stimulants and mycorrhizal fungi
Raw Materials
soil enrichment products with mycorrhizal fungi for landscape architects
Products for Arborists
Live Beneficial Mycorrhizae
Live Beneficial Mycorrhizae - Mycorrhizal Fungi
Horta Sorb water retaining management gel


Horticultural Alliance soil amendments, soil conditioners and root inoculants have formats available for private label marketing.
Soil Amendments for Homeowners
Soil Amendments for Homeowners
Our products contain a whole lot more than mycorrhizal fungi. We add other ingredients besides mycorrhizae to “stack-the-deck” with as many solid technologies that we can to make sure that our soil amendment products simply cannot be used without seeing a significant difference in the performance of a plant.
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Soil conditioner products 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 soil amendment products, with mycorrhizae for the professional landscape trade, in the world.
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Private labeling for Horticultural Alliance Die Hard products

Private Label DIEHARDTM Transplant
Include DIEHARDTM Transplant soil conditioner 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 Soil Amendment Products with Mycorrhizal Fungi

soil amendment for trees and shrubs containing mycorrhizal root inoculantsDIEHARDTM Transplant
Transplant soil amendment for trees and shrubs containing mycorrhizal fungi root inoculant compounds. Since 1997, has become the industry standard...
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biostimulant compound applied as a foliar, drench or root injection to turf, trees, shrubsDIEHARDTM 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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water absorbent water management gelsHorta-Sorb®
Horta-Sorb® , the highest quality super absorbent water management gel on the market today, is used in containers to hold water and nutrients in the root zone...
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Fruit & Nut Applications with bio-stimulants & mycorrhizal fungiFruit & 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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Nursery Plants are NOT Natural! How about Humic Acid?

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