
Screened, tested, and verified through the U.S. Composting Council’s STA program.
Parker Bark certified compost is produced from aged, wood fines, never manure-based inputs or food waste streams. We age, monitor, and screen our compost to ensure consistency season after season.
Unlike many compost options that rely on mixed consumer inputs, our material is engineered for professional performance—landscapes, nurseries, turf, and restoration. The result is a stable, predictable organic amendment that transforms soil.

Our certified compost is screened and independently lab-tested, making it safe for landscapes, turf, horticulture, and public spaces.

The Seal of Testing Assurance (STA) program verifies product quality through independent laboratory analysis. Certified compost is tested regularly to validate performance, stability, and safety.
Our compost is regularly tested for:
Practical, job-site tested recommendations:

We are a wholesale-only manufacturer. All orders must meet our cubic yard minimums and are intended for professional use.