Mulch and Soil Council
- Trade association for processors of horticultural mulches, consumer potting soils and commercial growing media in North America. Information about products and certification.
- http://www.mulchandsoilcouncil.org

John & Bob's Organic Soil Optimizer
- Supplier of concentrated soluble humus.
- http://www.johnandbobs.com

Laurel Valley Soils
- Pennsylvania manufacturer of soil and compost based products for wholesale to garden centers, landscape contractors, sports turf installers, and nursery growers.
- http://www.laurelvalleysoils.com/

Tref EGO Substrates
- Peat and substrates producer in the Netherlands, exporting potting soils for a variety of applications worldwide.
- http://www.trefgroup.com

Big Bear Hills, Inc.
- Producer and distributer of quality peat products worldwide for soil media enhancement in commercial, professional, agricultural and horticultural markets. Calgary, Alberta, Canada.
- http://www.bigbearhills.com

Raselina a.s.
- Producer of peat and substrates in Czech Republic.
- http://www.raselina.cz/

Peat Export
- Buys and sells several types of peat, which is used for fuel and fertilizer. Located in Riga, Latvia.
- http://www.peatexport.lv/

H & M Products Ltd
- Northern Ireland company producing natural seaweed products for use as fertilizers and soil conditioners for sports turf, horticultural applications, and livestock grazing areas.
- http://www.hmproducts.co.uk/

Jayampathi Lanka
- Suppliers of processed cocopeat and related products. Sri Lanka.
- http://jayampathi.com

Premier Horticulture
- Produces Canadian sphagnum peat moss based growing media, planting mixes and soils. Product and contact details.
- http://www.premierhort.com