Well I had initially bought some organic potting soil from Miracle Grow, but discovered it was auto-fertilizing so I ditched it. I want to be able to add my own nutrients that I've bought from Fox Farm (Big Bloom, Tiger Bloom, Grow Big) so I put together a soil mix of roughly 40% peat moss, 30% mushroom compost, and 30% perlite. I planned on adding dolimitic lime (I had read its a good additive) but have been unable to find it anywhere! I've checked all the hardware stores and nurseries, no luck. So I'm wondering if I can do without the lime? I've heard its neccessary to balance out pH, if I don't have lime in this mix, will I encounter some serious problems? Or is there a substitue for dolomite lime I can use? Thanks!