yeah the soil is fine. just let it get up to temp for a week or two before using. as above poster mentioned, a compost tea wouldn't hurt it (i would just do a compost extract, just rinse a couple pounds of quality compost with a strainer and plain water, maybe a gallon or so, and use the rinse water as a compost tea . should only need one. malted barley would also help it out alot, sugars and enzymes for days!