Clean Manure Challenge


Grab N’ Grow is the oldest soil yard in Sonoma County. Along with Mango Mulch, we make many fine compost and artisan soil blends—all which rely on top quality animal manure as fertilizer.  We are searching for ranchers in Sonoma, Napa and Marin counties that have clean manure from cow, horse, chicken or other interesting animals.  

What is “Clean” Manure?

Clean manure typically comes from organically fed cow, horse and chicken ranches and tests free for pesticides and the herbicides, Clopyralid and Aminopyralid. These herbicides are used to control many broadleaf weeds in wheat, barley, and alfalfa farming that cows, horses and chickens eat or use for bedding. When your animals ingest these feeds, their manure cannot be used in compost or soil blends. The herbicides remain behind, killing many popular crops including tomatoes, peppers, beans, carrots, and more.

What’s the Challenge All About?

We created the Clean Manure Challenge to raise awareness, educate our customers, and encourage livestock owners to only feed Aminopyralid-free and Clopyralid-free products to their animals. We hope to form long-term partnerships with ranchers interested in working with us to remove their animal manure from their farms or ranches on a regular basis. We became aware of the herbicide issue many years ago when a batch of Mango Mulch was contaminated with Clopyralid.

To protect our products and our customers’ gardens, farms and vineyards, we instituted an off-site testing protocol to ensure all manures are tested and free of these chemicals BEFORE they are transported to Grab N’ Grow.

And we need your help.

How Can I Participate?

If you raise cows, horses, chickens or other interesting animals in Sonoma, Napa or Marin counties, and would like to have your animals’ manure tested for these herbicides AT NO COST TO YOU, please complete the form on this page or contact Brett at 707-575-7275 to learn more about the Clean Manure Challenge.

Grab N’ Grow pays for all the testing and hauling of clean manure from Clean Manure Challenge approved ranches.

Want more information?

For more information regarding these herbicides, and their harmful effects on compost and plants, please visit the links below.

Thanks for taking time to learn more about the Clean Manure Challenge and the effects that these herbicides have on compost and soil products made with animal manures.

Please share this page with anyone you know who is looking to remove animal manure from their property.