Anne Pratt wrote:Ask the horse owner about their source for hay. The herbicide problem is not overhyped. The herbicide is Grazon (and other brand names), and IIRC the generic name is amipyralids.
Hay farmers who produce specifically for horses use this stuff to make hay without broadleaf weeds. It is excreted in the manure, and remains there after composting.
It’s safe for grasses, but will kill nearly all your vegetables. Google the photos. It’s horrifying.