Super cropping marijuana - the short explanation. Do this to all main branches that are still bendy, before the flowering stage. In response, plant will grow a 'knot' that allows her to transport more water and nutrients. Marijuana plants react to super cropping by getting bushier and producing more bud sites. Full tutorial here: http://growweedeasy.com/how-to-super-crop-marijuana
Alnwick Garden - The Poison Garden has about 100 varieties of toxic plants, as well as cannabis and opium poppies. I'd like to see a list of what they have planted there. Considering the huge number of plants with poison parts I'm surprised they have only 100 or so there.