i am an outdoor organic grower and my cannabis grows with all my vegetables in the same garden. The mix i use that worked really well last year was organic compost, manuer and peat moss. Super inexpensive and easy to find. I never had any problems and everything i grew was really great.
Peat moss-$9.98/lowes/60gallons
Pearlite-$4.98/walmart,lowes/ ½ gallons
Vermiculite -$4.98/Walmart ,lowes/ ½ gallon
Cow menure-$1.45/lowes/2 gallons
blood meal & bone meal-$ dont remember/Walmart / not sure
Fish guts- $free/fish market /tell them ur going catfishing w/ ur buddies all week/bring 2 5gallon buckets
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Mix as instructed-
If gUerilla grow then keep peat moss in pack..
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Easy way to carry/how to make a peat moss back pack-
Take one piece 3-4ft rope,one towel(for cusion)tie the ends together to make a big O put ur pack in the middle of the pack then take 2ft piece of rope and
Tie so u have a back pack, two ropes on bottom one on top...
Heavy but easyer then haluing on ur shulder...
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If money isn't an issue then u may be able to find a better soil but in my oppinion its the best the more soil u put in ur hole the bigger the plant which means bigger yeild,
Peat moss is light, drys nicly and plants flow threw it w/ no problem and one bag can easyly grow 5 plants...
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Hope that helps