I started growing wheatgrass by ordering a "kit" from wheatgrasskits.com. The soil they sent was EKO Organic Soil Mix along with Azomite fertilizer. EKO is made up of simply Canadian sphagnum peat moss and perlite.

Now, when i ran out of soil and went searching for more, i hoped to find a similar replacement. After checking Home Depot, Ace Hardware, and Walmart, all i could find were deluxe potting soils. They all contain cow manure, poultry waste, and bat guano as fertilizer. I read in another post on this forum that manure can breed E.coli and salmonella at the bottom of the growing trays. I'm growing indoor and should i be concerned about this?

I ended up getting SuperSoil potting soil which is made up of Canadian sphagnum peat moss, potassium nitrate, triple superphosphate, calcium nitrate, ureaform, ferrous sulfate, dried poultry waste, feather meal, alfalfa meal, kelp meal.

I was planning on sticking with the plain Canadian sphagnum peat moss and perlite mix and switching from azomite to sea kelp meal for fertilizer. Will the Supersoil be optimal enough to produce quality wheatgrass juice and should i be concerned about the poultry waste?

I'm in southern california if anyone has any suggestions for nurseries or stores to try.