Ask Mighty Mustard

Whether you're an experienced farmer or a new gardener, we have answers to the top five questions asked about Mighty Mustard®.  For a more complete list of questions and answers, please visit our /FAQ page.

What is Mighty Mustard®?

It is a fast-growing biofumigant cover crop planting seed that naturally suppresses weeds, harmful insects, and soilborne diseases.  It is plant-variety protected, certified planting seed, and verified non-GMO by the Non-GMO Project.  There are three varieties: Kodiak (Brassica juncea, a brown mustard), IdaGold (Sinapsis alba, or yellow mustard) and Pacific Gold (Brassica juncea, also known as oriental or brown mustard).

How does Mighty Mustard® work?

Mighty Mustard® contains high levels of glucosinolates, natural chemical agents that make certain members of the brassica family spicy.  Mighty Mustard's® glucosinolates deliver a deadly punch to many soilborne pathogens and weeds, making them an effective, all-natural alternative to chemical herbicides.  Mighty Mustard® is also a fast-growing cover crop that quickly crowds out weeds.  The chemical makeup of Mighty Mustard's® glucosinolates is similar to many commercial pesticides, including Dazomet, Vapam, and Vorlex, as well as the fungicide metam sodium.

What can Mighty Mustard® do for me?

  • Suppress weeds
  • Reduce harmful insects, nematodes and fungal disease
  • Increase organic matter
  • Recycle & redistribute nitrogen in the soil profile
  • Reduce wind and water erosion
  • Improve the long-term health of the soil
  • Sequester carbon

Where can I plant Mighty Mustard®?

  • Fruit and vegetable gardens
  • Potato fields
  • Grain fields
  • Vineyards
  • Orchards
  • Hoop houses
  • Tired, fallow soil in need of rehabilitation

Is Mighty Mustard® safe to use around children and pets?

Yes.  Mighty Mustard® is non-toxic.  However, due to its extreme spiciness, children and pets SHOULD NOT eat the mustard seeds or plants, or rub their eyes after touching the mustard seeds or plants.

Do you have other questions?

Please call Matt or Kim today at 509.487.0755 and they will find your answers for you!  You can also send an email to



Want to put Mighty Mustard to work for you?

Call 509.487.0755 today to learn what Mighty Mustard™ Pacific Gold and IdaGold cover crops can do for you.