Made in Grants Pass, Oregon

Healthier roots.
Better plants.

Big Foot adds beneficial mycorrhizal fungi and microbes back into your soil — the same naturally occurring organisms that plants evolved with for millions of years. The result: stronger roots, less transplant shock, and more vigorous growth.

Shop All Products How It Works

Shelf stable up to 3 years

Works for all plant types

OMRI listed organic

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Big Foot Gold

Most advanced formula — bacteria + myco

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Root Boost

Azospirillum for faster root establishment

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Ecto-Mycorrhizae

Designed for conifers, hardwoods & shrubs

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Concentrate

Water-in mycorrhizae — easy application

Our Products

Mycorrhizae for every plant & grower

Every Big Foot formula is packed with endo-mycorrhizae spores that bond with root systems — no fillers, no fluff.

Best Seller

Big Foot Gold

Big Foot Gold is loaded with beneficial bacteria and mycorrhizae. The most advanced formula on the market.

Gardens Vegetables Transplant

Endo

Big Foot Granular

Our Granular mycorrhizae is a cost-effective way to reduce transplant-shock and establish healthy roots for your greenhouse plants.

Greenhouse Pots Seed Start

Soluble

Big Foot Concentrate

Water-in this highly soluble mycorrhizae to give your gardens and grows mycorrhizae-powered roots.

Water-In All Plants Easy Use

New

Big Foot Root Boost

Plants need nitrogen, and the azospirillum in our Root Boost helps clones, cuttings, and current plants root faster.

Clones Cuttings Seedlings

Ecto

Big Foot Ecto-Mycorrhizae

Mycorrhizae designed for conifers, hardwoods and shrubs.

Trees Shrubs Conifers

Simple Application

Three steps to healthier roots

Mycorrhizae works with your existing routine — no special equipment, no complicated process.

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Apply at Root Zone

Sprinkle granular directly into the planting hole or mix into potting media. For concentrate, dissolve in water and apply to root zone at transplant.

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Fungi Colonize Roots

Mycorrhizal spores germinate and form a symbiotic bond with your plant's root tips — extending the root system up to 700x its original surface area.

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Plants Thrive

Your plant accesses more water, more nutrients, and recovers faster from transplant stress. Expect faster establishment and more robust growth all season.

Why Big Foot

The original mycorrhizae formula

We've been doing this since the first scientific studies on mycorrhizal fungi. No shortcuts, no fillers.

No Fillers

Our endo-mycorrhizae formula contains no carriers or filler material. Every gram is active spores and beneficial microbes.

3-Year Shelf Life

All Big Foot products stay effective for up to 3 years when stored properly — stock up without waste.

Science-Backed

Our formulas are rooted in decades of peer-reviewed mycorrhizal research. We were there at the very first studies.

Made in Oregon

Manufactured at our HQ in Grants Pass, Oregon — where the most groundbreaking myco research is happening.

OMRI Listed

Certified for organic use. Grow clean, grow confident — our products meet strict organic input standards.

Works for All Plants

Vegetables, flowers, trees, shrubs, cannabis, houseplants — we have a formula specifically matched to your plant type.

Made in Oregon

Backed by science.
Grown with passion.

Big Foot Microbes and Mycorrhizae is made at our headquarters in Grants Pass, Oregon — in the beautiful Pacific Northwest where some of the most ground-breaking research is being done on the benefits of fungi like mycorrhizae.

Our myco contains endo-mycorrhizae spores, which forms with more root systems than other mycorrhizae which can contain fillers. We've added high-quality soil amendments like kelp, biochar, micronutrients and other natural plant boosters.

700x

Root surface area increase

3 yr

Shelf stable life

95%

Plants respond to myco

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Headquarters

Grants Pass, Oregon

See It In Action

What's inside Big Foot Mycorrhizae?

Watch how our unique blend of myco, azomite, and kelp works together to build a living soil ecosystem.

Growers love Big Foot

Home gardeners, greenhouse growers, and landscapers across the country trust Big Foot for healthier plants.

★★★★★

"I've tried four different mycorrhizae products over the years. Big Foot Gold is the only one where I can actually see the difference — my tomatoes established in half the time and produced like crazy."

Mike R.

Home vegetable gardener, Ohio

★★★★★

"We use the Concentrate formula for all our greenhouse starts. Transplant shock is basically eliminated. Our plant survival rate went from ~85% to over 97% after switching to Big Foot."

Sarah T.

Greenhouse grower, Washington

★★★★★

"The Ecto formula is the real deal for trees. I planted 40 Douglas firs last fall — used Big Foot Ecto on half. The difference in spring growth was dramatic. Ordering again this season."

Dave L.

Reforestation project, Oregon

For Businesses & Growers

Need a custom product or house brand?

Create a new product blend or house brand using the same premium soil amendments found in Big Foot's line. Custom blends starting at $5,000.

Custom & White Label →

Healthier roots.Better plants.

Mycorrhizae for every plant & grower

Three steps to healthier roots

Apply at Root Zone

Fungi Colonize Roots

Plants Thrive

The original mycorrhizae formula

No Fillers

3-Year Shelf Life

Science-Backed

Made in Oregon

OMRI Listed

Works for All Plants

Backed by science.Grown with passion.

What's inside Big Foot Mycorrhizae?

Growers love Big Foot

Need a custom product or house brand?

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Healthier roots.
Better plants.

Backed by science.
Grown with passion.