GroCo compost provides organic matter to soils and improves the physical properties of both sandy and clayey soils. GroCo is appreciated by gardeners and commercial landscapers for its ability to aerate soil, retain moisture, and produce beautiful blooms. GroCo also helps to protect Puget Sound because it helps urban soils retain rainwater like a sponge, which reduces the amount of dirty stormwater flowing into Puget Sound. Loop has enriched Pacific Northwest landscapes since 1976.
To create GroCo, one part Loop is mixed with three parts sawdust from local lumber mills. At GroCo Inc., the sawdust-Loop mixture is stacked into large piles that are turned regularly to keep them aerated and hot. In addition to laboratory testing, the temperature of the piles is regularly monitored to ensure that it meets EPA pathogen reduction requirements. After all pathogens have been killed off by high heat, the compost piles are left to mature for about a year. Once GroCo compost is stable, mature, and pathogen-free, it’s ready for sale. All of the nutrients found in Loop are also found in GroCo compost, although at lower concentrations because of the blending with sawdust.
Add it to your garden soil, containers, or indoor pots to turn your dirt around and get lush plant growth.
|TYPICAL VALUES OF MAJOR NUTRIENTS FOUND IN GROCO COMPOST.|
|Total Nitrogen: 1.24%
Plant Available Nitrogen: 0.24%
Organic Nitrogen (slow-release): 1.00%
Phosphorus (as P2O5): 2.04%
Potassium (as K2O): 0.19%
Organic matter: 85.6%
C to N ratio: 35
All values are reported on a dry weight basis.
Gardener and soil scientist, Kate Kurtz, discusses why she chooses GroCo compost made with Loop® biosolids in her home vegetable garden. For Kate, it’s a choice of environmental ethics and she knows it grows a lush, beautiful garden
Local gardeners and landscapers have also used GroCo compost for decades, and GroCo is used on a ton of awesome community projects. GroCo compost and recycled water are two endlessly renewable resources used at our City Soil Farm, located at the King County South Treatment Plant in Renton.
To learn more about City Soil and to see who else turns their dirt around with GroCo compost made with Loop, visit Our Partners.