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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Drought Protection with Mycorrhizal Fungi Products

DIEHARD™Mycorrhizae: Don't Reset Without It!
Anyone involved in agriculture, especially citrus, fruit and nut orchards understand the importance of new plantings to be able to endure droughts. Fortunately for agricultural professionals, we at Horticultural Alliance have a solution for drought protection. Our soil amendment compounds with mycorrhizal fungi are specifically formulated for new plantings to persevere through harsh periods of drought. We accomplish this by including dozens of university proven, and industry verified ingredients which enable transplants to root out suddenly and completely. Don't plant orchards, groves or vineyards without soil conditioners.

Horticultural Alliance's DIEHARD ™ Mycorrhizae fungi products represent the latest in technology for you to manage the early growth of citrus trees during the establishment period and beyond. The product promotes overall plant health and soil health which in turn provides faster growth, higher yields and faster payback.

Drought And Its Effects On Resets: Battling It With DIEHARD™ Endo-mycorrhizal Products
Reduce the harmful effects of drought stress and yield more profitable harvests with DIEHARD™ mycorrhizal fungi citrus applications like many parts of the country are well known for its plentiful sunshine and rain fall. However, commercial plantings will typically go through periods of stress during the year whenever growth conditions are less than ideal. For example, drought stress can happen whenever soil water levels aren't adequate or whenever a front moves in with lower humidity - which is typical throughout the year. Drought is one of the most devastating stress on crops, and can be brutal for new transplants. Because of the highly managed growing techniques used in commercial nurseries new plants simply are not prepared for field conditions in new, or established orchards. Drought changes a tree's ability to take up nutrients from its surrounding soil and changes the way the tree produces roots, shoots, leaves and fruit. To strive for consistently profitable commercial harvests, grove managers must integrate strategies to minimize the negative effects of weather variations on production.

Early Growth Strategies To Combat Drought With DIEHARD™ Endomycorrhizal Products
As we pointed out elsewhere on our website, conditions during early stages of tree establishment are crucial for producing high-yield groves. Of all the advances made in grove management in recent times, the greatest potential for improvement is early young tree establishment in both reset and block planting operations. I think, after you try out the DIEHARD™ Endo mycorrhizal products; you will agree the use of a "cocktail" of endomycorrhizal fungi, bio-stimulants, humic acids, amino acids, sea kelp extracts, yucca plant extracts, beneficial bacteria, vitamins, Trichoderma fungi, and Horta-Sorb® water management gels results in better conditions to get the reset tree off to a better start.

Root Development, DIEHARD ™ Endomycorrhizae and Surviving Drought Stress. However, reset trees can still get stressed if conditions aren't optimal. The development of new roots at the expense or delay of additional shoot or top growth is one way a tree can recover from stress. Therefore, use of Endomycorrhizae and Horta-Sorb® water management gels can go a long way to sustain water and nutrients in area soils.

For example, when nutrients in the soil are insufficient, the tree may produce more root growth than shoot growth. In effect, the tree is "exploring" additional soil volume in an attempt to satisfy overall nutrient demand. A similar effect can occur during drought stress, when shoot and fruit growth are curtailed more than root growth, so root growth appears to occur first followed by shoot growth. Thus, moderately drought-stressed roots tend to explore more soil volume than well watered roots. New shoots can produce additional photosynthesis and shoot and fruit growth will resume once roots have re-established the root-to-shoot ratio for existing conditions. Good water management, therefore, minimizes root growth so as to promote shoot growth and optimize yield.

The Bottom Line: Drought Resistant Transplants and Established Crops Yield More CashWise, strategic water management is essential for vibrant plant growth. At Horticultural Alliance, we are dedicated to helping growers achieve the greatest yield possible. Along with Horta-Sorb® water management gel polymers, our DIEHARD™ Mycorrhizal fungi blends are proven winners for protecting your valuable crops against the rigors of drought.
DIEHARD™ Granular Soil Amendments: Don't replace your citrus grove without it.

Contact us, with questions: 800-628-6373
James J. Quinn,
Horticultural Alliance, Inc.

Horticultural Alliance

1550 66th Ave. Dr. East, Sarasota, FL, 34243

941.739.9121 • Email

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