hey ub, do you know if using miracle grow pearlite would effect anything in a dirt mix? i wish i could give you a % of what's what in the mix but i ran out of my pro-mix unexpectedly and tried to make my own concocktion . i used a basic 'top soil', and an 'organic blend' (some peat & spag. moss, compost, top soil), some added spag. moss, some d. lime, and lots of the mg pearlite. i rinsed the pearlite with lots of water before i used it, but then i got to thinking that it's probably a slow release. my plants are slow growing and have kept a light green color to them. been careful not to overfeed or overwater, no signs of either. i up-pot three times each plant. would the organic blend cause issues too? it's amazing here where i live their is not shit to choose from except for what's at lowe's, home depot, or wal-mart and they all carry the same things. i guess i could have used straight spag. moss and lime. your thoughts on this would be greatly app. thanks