[Lucian]

Well, I have tried a few soils. Promix is my third choice, It is a good soiless mix but the pH is 5.5 so you have to adjust it by mixing in lime. Plants will still grow ok with it but won't reach max size. Second choice is sunshine mix #4. Good stuff with no need to tinker with it. The best is what I now use but you can only get it at a hydro store or online. Fox Farm. It is the best brand there is short of mixing up your own. I add in a bag of wormcastings which is great stuff and fert with bat and seabird guano. Search Ebay for 'Guano' to get the idea. You'll want square pots for keeping Moms as they need root trimming a few times a year and the cube shape makes it infinitely easier; just shave an inch off all sides and bottom and repot with new wormcast heavy/rich dirt.

Edit: Dirt maybe hard to find as it is winter where I am but my GF likes gardening in general and bought these little 1 gallon bags of dirt from the dollar store and I was AMAZED at how black it was. You would just need to add perlite but something to consider if found.