Big Foot Mycorrhizae Concentrate, 50lb

Water-In Mycorrhizal Fungi Concentrate, 50 Lb

Granular mycorrhizal products work well worked into a planting hole, but they're awkward to apply through an existing irrigation or fertigation system. Big Foot Mycorrhizae Concentrate is a water-soluble blend of four endomycorrhizal fungal species, built specifically for drench and water-in application.

Sold as a 50 lb container.

Key Features & Benefits

• Four endomycorrhizal fungal species — Glomus aggregatum, G. etunicatum, G. intraradices, and G. mosseae, each at 20 propagules per gram.
• Blended with biochar, worm castings, and kelp — softwood biochar and worm castings alongside kelp species Ascophyllum nodosum, Sargassum, and Laminaria.
• 29.51% humic acid from leonardite — included as part of the concentrate's growth-supporting blend.
• Built for water-in and drench application — the water-soluble concentrate form of Big Foot's mycorrhizal lineup, distinct from their granular product.

Who Should Use This Concentrate

This fits growers running fertigation or drench systems who want to introduce mycorrhizal fungi without switching to a granular soil amendment. It's the water-soluble counterpart to Big Foot's Granular mycorrhizal line, not a substitute for base nutrients.

About Big Foot Mycorrhizae Concentrate

Big Foot Mycorrhizae Concentrate, made by the American Root Company, is a water-soluble blend of four endomycorrhizal fungal species with biochar, worm castings, kelp, humic acid, and Azomite, sold as a 50 lb container.

Frequently Asked Questions

How is this different from a granular mycorrhizal product?

It's formulated to dissolve and apply through water — a drench or fertigation system — rather than being worked into soil or a planting hole like a granular product. Big Foot also sells a Granular line for that application method.

What fungal species are in this concentrate?

It contains four endomycorrhizal species: Glomus aggregatum, G. etunicatum, G. intraradices, and G. mosseae, each present at 20 propagules per gram.

When should I apply this concentrate?

Mycorrhizal inoculants generally work best applied early, when roots are actively developing and can form the fungal association. Check the product label for the specific application rate and timing for your system.

What else is in the blend besides the fungal species?

It's combined with softwood biochar, worm castings, three kelp species, humic acid derived from leonardite, and Azomite, rounding out the concentrate beyond the mycorrhizal fungi themselves. Each component supports a different part of root zone biology alongside the fungal inoculant.