Posted on 1st Jul 2011 @ 9:22 AM

ATTENTION COMPOSTERS

There is a class of herbicides called pyridine carboxylic acids that is used to control a wide variety of broad-leaf weeds. But here is the thing: these chemicals, namely picloram, clopyralid, and aminopyralid, can remain active in manure, hay or grasses for long periods of time; even after being composted.

Read more about herbicide carryover into compost.