A few points :

1) all cannabis is "Cannabis Sativa". Whether grown for fibres or drugs. There are 2 subspecies, Cannabis Indica and Cannabis Ruderalis (some debate over a Cannabis Rasta strain). Cannabis grown for fibre has been bred to have as close to zero THC as possible. Cannabis grown for medicine has been bred to have as much THC as possible. However it is entirely possible to cross-breed the two.

2) THC, the main active ingredient in the medicine/drug is not an hallucinogen. It is psychotropic and psychoactive.

apart from that, big respect to Chelsea for showing this fascinating plant

jethro, London,

"A special licence was required to grow the plants and to show them at the Royal Horticultural Society’s premier event.A special licence was required to grow the plants and to show them at the Royal Horticultural Society’s premier event." ????????

Looks like someones been smoking these plants!! naughty naughty!

Adam Webb, Mk, UK

When considering the uses of the hemp plant we need to be thinking about more than just fiber for clothing. Although hemp is a much more suitable source of fiber than cotton for many reasons we also need to consider the other uses of hemp such as food and bio fuels.
Industrial hemp is the governments own version of "Genetically Modified" Hemp.
Industrial Hemp produces a lot less biomass than natural hemp because industrial hemp has been bred to produce less flowers. Less flowers means fewer seeds.
When using hemp for oil production the seeds are the most important part as the oil is made from the seeds.
Natural hemp produces 3 times as many seeds as industrial hemp and with selective breeding many more seeds could be produced.

Paul, WGC, Herts