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DIEHARD™ Complete Organic

DIEHARD Complete Organic is an all-in-one organic mycorrhizal inoculant formula that boosts root growth, reduces transplant shock, and supports healthy, resilient plants.

Grow annual flowers with confidence using Horticultural Alliance products
Annual Flowers
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Perennial Flowers
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Hanging Plants
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Indoor Plants
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Fruit
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Vegetables

Price range: $62.50 through $625.00

DIEHARD Complete Organic is a high-performance organic mycorrhizal inoculant designed for use in a variety of planting applications, including turf, flowers, vegetables, vertimulch, nursery propagation, and soil or bed amendments. It delivers the biological power of the trusted DIEHARD™ cocktail, but with reduced gel polymer, making it ideal for organic growers or those who prefer a lighter formula for bed preparation or broad application.

As an organic mycorrhizal inoculant, it introduces beneficial Endo and Ectomycorrhizal fungi to the root zone. These fungi form a living symbiosis with plant roots, extending their reach and significantly improving water and nutrient uptake—especially phosphorus, nitrogen, and micronutrients. This biological boost enhances soil activity, energizes root systems, and leads to faster plant establishment.

Complete Organic is especially effective in helping plants recover from transplant stress. Its root-friendly formulation speeds up colonization, strengthens early root development, and leads to more uniform, vigorous growth. Whether you’re planting annual flowers, maintaining lush turf, or growing high-value vegetables, this product sets the foundation for long-term plant health and productivity.

Additionally, this organic mycorrhizal inoculant improves soil structure and microbial life, making it an excellent amendment in beds or planting mixes. It can be incorporated directly into soil, used in vertical mulching, or applied in greenhouse and nursery operations where quick rooting and resilience are top priorities.

DIEHARD Complete Organic is the go-to choice for growers who want the power of the DIEHARD™ system in a clean, efficient, and organic-compatible formulation. It supports plant health naturally, reduces transplant shock, and enhances the root environment for sustainable, high-performance growing systems.

HOW IS IT USED?

Transplanting:

Flower Beds & Vegetable Plantings: Mix thoroughly into the first 3″ to 4″ of soil at the rate of 2 lbs. per 100 sq. ft. of bed

Seedling:

Band beneath seed or transplants and cover with 1/4 to 1/2 inch of soil at the rate of 1 tsp. per plant or one cup per 25 feet of row

Bulbs:</strong>

Place one tablespoon beneath each when planting

Vertimulching:

Bore 2 in diameter holes on a 2.5 to 3 ft grid pattern in the vicinity of roots and mix 4 oz. of product with soil removed and return to fill hole

Maintenance Application every 6 weeks for maximum effect.

The information provided in our informational documents is for general guidance only and is subject to change without notice. While we strive to ensure accuracy and relevance, updates or modifications may occur over time. 

Your order will typically ship within 3-5 business days. Please note that weather conditions and carrier delays may occasionally affect shipping times. If your item arrives damaged, please refer to our return policy for assistance

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