Biosolids compost for gardens
Compost made with biosolids is a safe and effective soil amendment for lawns, gardens, and landscaping. Loaded with nutrients and organic matter, biosolids compost builds healthy soil, retains moisture, and produces lush plants with beautiful blooms.
What is GroCo compost?
Three parts sawdust and one part biosolids are blended and composted for a year to create a fine-textured 'exceptional quality' biosolids product. GroCo has been marketed in greater Seattle area since 1976 and has a loyal following with commercial landscapers and home gardeners.
GroCo made with Loop is now Declare certified, meeting Living Building Challenge (LBC) standards. LBC is the built environment's most rigorous performance standard.
Where can I get GroCo compost?
It is available throughout the greater Seattle area and at Sawdust Supply, Inc., 6314 7th Avenue South, Seattle, 98108.
King County contracts with a local private company to make GroCo.
For information: 206-622-5141
Download a GroCo Brochure (PDF, 1.7 MB)