Our Grow Green Compost is now STA Certified.
The US Composting Council’s Seal of Testing Assurance Program (‘STA’) is a compost testing, labeling and information disclosure program designed to give you the information you need to get the maximum benefit from the use of compost.
Our compost is tested every 3 months and analyzed for the following properties:
nutrient content (total N, P2O5, K2O, Ca, Mg)
organic matter content
particle size (report only)
pathogen (Fecal Coliform or Salmonella)
trace metals (Part 503 regulated metals)