Yes I do check it every time before I water. I have a soil with the following ingrediants sedge peat, sphagnum, peat, pearlite, bone meal, feather meal, bat guano, seabird guano, rock phosphate w/humates, lime, and fossilized kelp.:rasta: Its made by power flower I emailed them and they said theres no specific npk for each bag. I havent added any nutes to these because I thought this soil would be good enough until I put them into flower.