Since several US states like Colorado have legalised growing marijuana for personal/medical use, home growers are looking for horticultural help. But federally-funded horticulture course providers and volunteer master gardeners cannot offer advice as growing pot is against federal law. Photo from Cannabis University.
In cold climates like Colorado, cannabis plants must be grown hydroponically indoors, which is not an easy skill to learn. Several private providers have realised the commercial potential of growing classes, but must practise on tomatoes or risk prosecution. More at Yahoo News