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acid alkaline amount artificial light bracts branches buds cannabinoids Cannabis sativa chemical chlorophyll colas colchicine Colombian color composts concentration contain crop cultivation curing deficiencies develop dried drug Ed Rosenthal effective feet female flowers female plant fertilizer Figure flea beetles fluorescents gallons garden germination grass green growers growing season growing shoots grown growth harvest hashish healthy hemp humidity humus inches increase indoor insecticides insects intersexes juana layer leaf less lime male flowers male plants manure marijuana marijuana plants material mature mites moist months mulch nitrogen nutrients outdoors percent perlite pests Pharm photoperiod photosynthesis phyllotaxy plants grow plastic pollen polyploids potency pots resin glands roots sample seedlings seeds sinsemilla smoke soil soilless mixtures soluble spray sprout sq.ft temperature Thrips tion tips trace elements transplant tubes usually varieties vegetative vermiculite watts weeds weeks weight whiteflies