Seed starting mix is a “soil-less,” light-weight growing medium that does not contain:
Potting soil is a heavier mix than seed starting mix. It Used to provide nourishment for growing seedlings once they are ready for the real world. It contains some earth soil, as well as compost or manure, peat moss or vermiculite.
A type of soil amendment that typically contains some fertilizer, nutrients, compostable material or non-oganic elements. A soil conditioned can help improve soil structure by increasing aeration, water holding capacity and nutrients. These can help break up compacted clay soils.
Tagro (https://tagro.com/products-pricing/) products created and marketed by the City of Tacoma. TAGRO products are made from a blend of pasteurized wastewater byproducts called biosolids and other weed-free gardening components.
For detail about TAGRO Potting Sil and Topsoil see https://tagro.com/products-pricing/.
TAGRO Mix is a soil amendment that is a blend of 50 percent “Class A—Exceptional Quality” biosolids, 25 percent sawdust and 25 percent screened sand. TAGRO:
We have used TAGRO Mix with flower beds, container and raised bed. Plants grow quickly and boldly.