Manufactured in Abbotsford, BC, this is an OMRI listed, finished compost product that can be used as a top dressing or mixed into regular garden soil. Boost Concentrate adds humic acid rich organic matter to improve soil structure and to feed the biological activity in healthy soil. Mix some in with conventional potting soil for stronger plant growth and good root health. Or add a bag to the surface of a raised garden bed to improve moisture retention and to feed earthworms and other soil biology. This product is available in two sizes: A 4L bag or a large 30L bag.