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EM-1 Microbial Inoculant
EM-1 Microbial Inoculant - Effective Microorganisms - EM
EM-1 Microbial Inoculant

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Put the power of EM Technology® in your hands!

Dr. Teruo Higa's Original Effective Microorganisms®
EM·1® Microbial Inoculant for all your garden and compost needs.

EM·1® Microbial Inoculant is made in the USA.

Get yours today! Ask for EM-1 at your local garden center or grow shop!

Free shipping on 16oz, 32oz, 1 gallon, and 5 gallon containers.
Please note: During winter months all EM-1 shipments will be shipped with Signature Required to prevent freezing.

Microbial Inoculants: EM-1

EM•1® Microbial Inoculant is the original and authentic Effective Microorganisms® that was originally formulated by Dr. Teruo Higa in the mid-1960's.
EM•1® is an all-natural probiotic for plants and soils.
It is made without any GMO ingredients and is USDA certified organic.
Available in pints, quarts, gallons, 5-gallons and 55-gallon barrels.

Gardening with EM-1
Sweet Potatoes and soil test with EM
Item# Item Name Prices Start At: Prices Start At: Qty Add
1003 EM-1 Microbial Inoculant-1 Gallon (Standard Ground Shipping Included)
1002 EM-1 Microbial Inoculant-1 quart (Standard Ground Shipping Included)
1007 EM-1 Microbial Inoculant-16oz (Standard Ground Shipping Included)
1004 EM-1 Microbial Inoculant-5-gallon cube container (Standard Ground Shipping Included)
Check the items you wish to purchase, then click


OMRI Listed

California Department of Food and Agriculture Listed for Organic Operations as well. (CDFA OIM)
USDA Certified Biobased Product
Certified Organic by CCOF

  • Improves drought tolerance
  • Restores the natural balance of healthy soil
  • Naturally loosens compacted soil
  • Improves seed germination and root development
  • Improves flavor of fruits and vegetables
  • OMRI Listed
  • Increases nutrient availability
  • Improves plant quality: size, color, and shelf life
  • Accelerates conversion of organic matter into soil humus
  • Increases beneficial microbial activity
  • Bioremediation Bacteria Eliminates Foul Odors In The Home (Pets, Smoke, Garbage, Drains, Paint, etc.)


Microorganisms: Minimum of 1 million colony forming units/cc (units/ml), Lactic Acid Bacteria

Water and Molasses

There is an expiration stamped on every bottle of EM-1, as well as a batch number. The Expiration date is generally close to 12 months from shipping.


For all household applications:
Applying EM•1 ® is very simple. You have two options. The first is to use it right from the bottle. The second is to make Activated EM-1 and cut your costs by 22 times! Just fill the reservoir of a hose-end sprayer with EM•1®, as you would with any fertilizer, and spray all your plants. One hose-end sprayer will treat about 1/8 acre. For best results spray once per week throughout the growing season and pre-treat all your organic matter (potting soil, peat moss, compost, etc.) with EM•1® (this is also known as a drench). Some hose-end sprayers let you dial in the dilution rates. You can use the rates suggested on our label to set the application rate. We suggest one ounce per gallon (2 TBS) for all plants. The best time to spray is early evening.

For Agriculture:
Average applications are 1 gallon of Activated EM-1 per acre per week from sowing seed until harvest. There are some variations depending on the plant. Total rates vary:
Cotton, Corn, Hemp, Soy and Wheat is 15 gallons total per crop. Most other crops benefit from 25 to 40 gallons per acre per season.

For Hydroponics:

  • 1:1,000 solution EM•1® Microbial Inoculant several times per week.
  • Feed with a 2% solution of nutrients several times per week.

Water can also be conditioned using our 35mm Pipe Ceramics. For every 1,000 gallons of water in tanks, use 4 sets of the 35mm EMX Ceramic pipes. They can be put inside a 1 1/4" PVC pipe and plumbed directly into the main supply line. This will help condition the water and pull out dissolved solids in the water. If the unit is set up on a circulation system, you will notice it makes better use of the ceramics.

In the water lines, add Activated EM-1 starting at a rate of 1:1,000 (1 teaspoon per gallon) and as needed to maintain recommended dilution ratios with replacement water. Continue to use nutrient solutions as EM•1® is not a replacement for nutrients. Facilities that water every day should dilute 1 part AEM to 10,000 parts water.

Make Activated EM-1 for all of the applications above. 1 gallons makes 22 gallons of usable product.

Do not store EM·1® in direct sunlight. Store in closed container at room temperature. Do not freeze.

Product shelf life is per expiration date printed on label when product is left unopened. After it is opened, life is dependent upon conditions on which it is stored of which EMRO USA (manufacturer) nor TeraGanix will guarantee. Neither EMRO USA nor TeraGanix, Inc will guarantee activated products, homemade bokashi, homemade EM5, or homemade EM FPE at any time.

Average Customer Review: Average Customer Review: 4.5 of 5 4.5 of 5 Total Reviews: 158 Write a review.

  0 of 0 people found the following review helpful:
5 of 5 July 30, 2020
Reviewer: Paul Bailey from Danbury, CT United States  
Have used this product for years.
Very quick delivery.

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  0 of 0 people found the following review helpful:
5 of 5 EM1 for Activation July 29, 2020
Reviewer: Jared Green R/D from West Jordan, UT United States  
All it needed was  about 15 degrees more and it ferments quick.  Room T in here is never above 75.  Once I moved it outside right from the stove heating it to 120 it got right to it. The mystery is solved. PH strip say it's right where it ought to be . Wonderful Thank you Rebecca!

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  0 of 0 people found the following review helpful:
5 of 5 Love it July 29, 2020
Reviewer: Lindy Henderson from Brownwood, TX United States  
I've only used this twice on my garden and I can already see some changes, for the positive, taking place.  Will order again when I run out.


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  0 of 0 people found the following review helpful:
5 of 5 confirmación July 28, 2020
Reviewer: Enrique Garcia from SAN JACINTO, CA United States  
Es un excelente producto

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  0 of 0 people found the following review helpful:
5 of 5 EM-1 July 23, 2020
Reviewer: Umar Bey from Baton Rouge, LA United States  
Great products, excellent service, the best people to work with. Effective Microorganisms change environments for the better.

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