Organic Microbial Fertilizer

Living biology in a bag. No bulk, no filler, no mess.

Earth Medicine wakes up the moment you water it, feeding your soil the way nature intended. Safe around kids, pets, and wildlife.

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Earth Medicine fertilizer bag
★ Made in Idaho from recycled dairy
No odor, no dust, no mess Safe for kids, pets & wildlife 10x the potency of compost Free shipping on 7lb & 5lb bags
Dan Prefontaine, inventor of Earth Medicine A handful of Earth Medicine granules
How it started

One man, a mountain of dairy manure, and a better way to feed the soil

Dan Prefontaine spent over ten years making high quality compost for farmers in Idaho's Magic Valley, a region packed with dairy farms. He saw those farms producing huge amounts of manure every year and asked a simple question: how do we turn this into something that helps people grow better crops?

His wife, a soil food web technician, checked sample after sample under a microscope to confirm the microbes were alive, with no filler. Their compost was excellent. But large amounts of compost become too expensive to ship by the tonne outside a 60-mile radius.

So Dan built a gentle process inside his patented EM Chamber. With careful heat, moisture, and turning, the biology wakes up, multiplies by the millions, and naturally forms small granules. Those granules are Earth Medicine: living biology you can keep on a shelf, ship anywhere in the country, and spread by hand.

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Why it works

Not compost. Not chemicals. Something better.

Living microbes

It's alive. The microbes wake up when you water and start feeding your soil and roots right away.

Shelf-stable and easy

Dormant in the bag until you need it. Just broadcast it by hand or use a tablespoon, no special equipment required.

Safe for everyone

No odor, no dust, no mess. Non-toxic to kids, pets, and wildlife. Let the dog back on the lawn.

Recycled by nature

Made from composted dairy manure, processed in Dan's patented EM Chamber. Good for soil and planet.

Shop the bags

Pick your size and start growing

Best value 7lb Bag Organic Microbial Fertilizer

7lb Bag Organic Microbial Fertilizer

$39.00
5lb Bag Organic Microbial Fertilizer

5lb Bag Organic Microbial Fertilizer

$34.99
Sample Size - Plant & Garden Fertilizer

Sample Size - Plant & Garden Fertilizer

$14.00
How to use it

Three steps to living biology

1

Broadcast

Spread a generous handful over the area. You really cannot overapply it.

2

Water it in

Give the soil a good watering to wake up the microbes.

3

Let it work

Keep watering lightly for a few days while the granules break down into the soil.

Real results

See what living biology does

Potted plant before and after one dose of Earth Medicine, three weeks apart
Three weeks after a single dose of Earth Medicine.
Customer message: first successful carrot harvest in four summers, grown with Earth Medicine
A customer's first successful carrot harvest in four summers.

Gardeners love this stuff

★★★★★

"I use this once a month on all my plants and it's been huge in helping with growth. What a find."

Becky
★★★★★

"I've been buying your product for more than a year. Amazing. My plants love it! I've referred more than three people."

Dean Simpson, California
★★★★★

"Do yourself and your plants a favor and get this product. My house plants have never been happier."

Kaia Alline
Questions, answered

The questions we hear most

Is it safe around my dog and kids?

Yes. Earth Medicine is non-toxic to pets, kids, and wildlife. There is no odor, dust, or mess, and you can let everyone back on the lawn.

Is this just compost?

No. Compost mainly adds organic matter. Earth Medicine is a concentrated microbial fertilizer that activates the living biology in your soil. It starts as composted dairy manure, then goes through our patented EM Chamber, which multiplies the microbes and forms them into shelf-stable granules.

What about herbicides like glyphosate?

Independent testing showed only trace levels, and our biological process reduces them further: 0.11 ppm in the raw compost down to 0.03 ppm in the finished product.

How do I use it on houseplants?

Apply about a half to one teaspoon into the soil, then water it in to activate the microbes.

Can I use too much?

No, you really cannot realistically overapply Earth Medicine. Spread a generous amount, water it in, and the microbes do the rest.

Do you ship to Canada?

Not yet. Earth Medicine currently ships within the United States only, due to import and regulatory restrictions in other countries.

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