Is there scientific research proving that Mighty Mustard® really works?

Yes. The University of Idaho has conducted extensive research, found here:

Effectiveness of Mighty Mustard® Kodiak and several other cover crops
SOURCE: Practical Farmers of Iowa:

Guide to planting brassicas and mustards as cover crops
SOURCE: Sustainable Agriculture Research & Education and USDA

Cover Crops for High-Desert Farming Systems in Idaho
SOURCE: University of Idaho Extension

Growing Mustard as a Biofumigant Cover Crop
SOURCE: University of Massachusetts Extension

Mustards: A Brassica Cover Crop for Michigan
SOURCE: University of Michigan

Cover Crops can Improve Potato Tuber Yield and Quality
SOURCE: The American Society for Horticultural Science

Cover Crops for Vegetable Growers: Fall Mustard
SOURCE: Cornell University

Brassicas and Mustards for Cover Cropping in Organic Farming

Controlling Soil Disease in Giant Pumpkins (Scroll to “test results” links on page.)
SOURCE: Wallace Organic Wonder

Other university research includes:

Washington State University:
For general information about the effectiveness of mustard green manures, please visit the Washington State University web page:

Overview of Mustard Green Manures in Potato Production:

Using Green Manures in Potato Cropping Systems:

Monoculture vs. Polyculture: “Straight up” beats “cocktails” for cover crop productivity & ecosystem services - 2 part article by Dr. Andy McGuire of Washington State University's Center for Sustaining Agriculture and Natural Resources


Iowa State University:

Short Duration Cover Crops for Vegetable Production Systems:

Cover Crops in Vegetable Production Systems:

Kansas State University:

Cover Crops as Forage: Toxic Plants - Warning about possible glucosinolate toxicity caused by glucosinolates in mustard:

Michigan State University:

Mustard Cover Crops for Vegetable Crops:

University of Nebraska:

Cover Crop Mixtures: Effects of Diversity and Termination Method on Weeds, Soil and Crop Yield:

Kentucky State University:

Results from real farms

From organic gardens in the Northwest, to a Biodynamic farm in Minnesota and organic high tunnels in Kentucky, growers are finding great success with Mighty Mustard®. Read experienced growers’ Success Stories.


Searching for answers

Understanding Mighty Mustard’s® full potential as a biofumigant is an ongoing process. As one university researcher shared with us, “There’s a lot that we still don’t know.”

The nature of science

Researchers from around the country have conducted studies focused on Mighty Mustard’s® various biofumigation properties. While the mustards were effective in lab studies, some researchers weren’t able to duplicate the results in the field. For example, researchers at Kentucky State University and the University of California successfully reduced sclerotinia using isolated concentrations of IdaGold and Pacific Gold’s glucosinolates in lab experiments, but were unable to duplicate the results with Mighty Mustard® cover crops grown in outdoor test plots. Why? Researchers believe the concentrations of glucosinolates in the lab tests were far higher than those typically found in an average Mighty Mustard® cover crop. 

Are you a researcher?

If you would like to incorporate Mighty Mustard® into your research project, please call Kim Davidson at (509) 487-0755 or send an e-mail to


"Replenish your soil"

"I am a great advocate for crop rotation and the importance of replenishing the soil with cover crops whenever possible."

"Mustard is an excellent cover crop/green manure because it is a fast germinating seed."

- Diane Green, Greentree Naturals
Sandpoint, Idaho