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About Speciality Soils

Speciality Soils in Covington, WA was established on October 10, 1997 and for over a decade, has provided excellent products, services, and expertise to the horticultural industry of the Pacific Northwest and beyond. We are blenders of high quality plant growing medias for the production of horticultural industry plants.  We offer both inorganic and organic all-natural medias. Our organic mixes conform to the State of Washington and OMRI Organic Regulations.

Our product offering includes greenhouse mixes for annuals, vegetables, hanging baskets, pot plants and perennials. We also provide nursery mixes for indoor and outdoor growing in containers, pots or growing in the ground. We also supply  weed free landscape mixes for projects that require a heavier, sand-based media. In addition to these standard mixes, we also offer custom blended mixes for any type of project or plant-specific needs.  Our product service is unsurpassed by anyone in the trade.

As a comfort to our product users we have our medias tested for conformity by Soil and Plant Laboratory on a regular basis.

Ingredients with which we make our mixes include air dried and/or gas dried Canadian Sphagnum Peat Moss, Pumice, Aged CONIFER Bark, Composts, aged Alder Sawdust, Perlite, Vermiculite, Washed Sands, DiatoLIGHT (diatomaceous earth) and other special ingredients as required.
Nutrient charges for inorganic mixes are derived from potassium sulfate, calcium nitrate, ammo-phosphate, ferrous sulfate, gypsum, limestone flour, dolomite lime flour, processed micro nutrients and/or slow release fertilizers.  We add a non-nutrient wetting agent to enhance maximum water penetration and Essential growth stimulant.

Nutrient charges for our ORGANIC mixes are derived from dried Blood Meal, Feather Meal, cooked Bone Meal, Fish Bone Meal, Ferrous Sulfate, Gypsum, Sulfate of Potash, Limestone flour, Dolomite lime flour, Kelp Meal, Alfalfa Meal and Borax. (We do not use Cottonseed Meal).

The experience and expertise behind our business originated in 1974 as a plant growing and media mixing business. Since then, our experiences have spawned innovative product design that fuels customer success from backyard vegetable gardens  and landscaping to organic farms and roof-top botanical design.

When planning your next project, consider Speciality Soils, Inc. for whatever your media needs may be!