readin' raahtin' and RESEARCH! lincoln said "if you give me 6 hrs. to chop down a tree, I'd spend 4 hrs. sharpening the axe!". learn about soil. the best soil is organic, and has a 'structure'- not compacted, allowing oxygen to the roots,and good drainage,yet retaining water(unlike pure sand). good compost makes a massive difference! in a rush though, I'd mix some fallow black dirt, vermiculite or perlite, or leaf litter(not pine), and organic fert's such as: bat guano, fish bone emulsion, kelp,worm castings, wood ash and charcoal,seabird guano,etc. that'll be better than some miracle gro shit. chemical fert's.can burn your weed,and at best leave inferior taste and quality.