1550 66th Ave. Dr. East Sarasota FL 34243
941.739.9121 27.423212 -82.54545

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


ALL DIEHARD™ soil amendment 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.

In nearly every case our products are the best value:


Proven Soil Amendment Products and Soil Conditioners 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 & Soil Conditioners 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.

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 inoculants
DIEHARDTM 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, shrubs
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 gels
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 fungi
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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Why Landscape Architects Should Love Biologicals

You know I've never met a Landscape Architect that was not completely interested in the benefits of using a biological approach to landscape installations, I.e., less transplant shock, less establishment issues, and an overall more vibrant and healthy plant. Not one. After all, what's more important than results. Results matter. Results are paramount to a successful Landscape Architect practice. Results result in REPEAT business. Results also result in lost business. So if results are so important and all landscape architect want good results and therefore buy in to what our products are all about how is it all Landscape Architects aren't using these tools?

The answer has to be UNDERSTANDING. They all "see", and want, the benefits for plants they are using but aren't exactly sure how to use them or get them. The knowledge of how this all works is in the heads of everyone tuned in to the expanding knowledge base of organics and plant health. Problem is the knowledge is so spread out and compartmentalized it is hard to see the forest from the trees.

Let me "Splain It" in a nut shell.

  1. Biggest question – "Does it work?" - was a good one twenty years ago when no one knew for sure. Today? Please. Natural compounds used to enhance crops are today a global phenomena. Landscape materials because of their high costs are a natural for using biologicals. It is an essential part of the due diligence of the Professional Landscape Architect to investigate, and initiate the use of biologicals to yield a robust landscape at less cost and impact on the environment.
  2. What's the cost of using these soil conditioner compounds? Generally speaking a quality product will cost less than 2% of the cost of plant material treated. With trees for example, the cost is typically less than half the cost of staking the tree. (Seen some dead staked trees lately?) With turf figure 1.5 cents per square foot. Beds – 10 cents per square foot. (lasts years in the bed)
  3. So write a specification. Write one that is tight. Write one that is verifiable. Require receipts. Require specific rates of use. Write one with teeth. If the spec is loose don't bother. A loose spec for lights in a parking lot will yield tiki oil lamps at best.
  4. Work with a company who has been a partner with professional Landscape Architects for twenty years. We have tight specs. We have usage calculators. We have comparative analysis of competitive products – label against label – saving you tons of time and aggravation. We wrote the book on mycorrhizal fungi compounds. We've grown inoculums. We know them. We know where they work and how to use them. We're a million dollar company and most of our business is with landscape contractors that use our products regardless of if it is specified.
Got it?

Hope we "Splained It"

Need further information? Let us partner with you. We are totally committed to helping make your projects all they can be...."Results Matter", and good results build your reputation and practice.

Horticultural Alliance
Mycorrhizal Fungi Products for Landscape Architects

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