Since Colorado became med friendly, we have a booming industry which has raised awareness of strains, THC%, indica vs. sativa, etc., etc., etc. Funny thing is that I have done outdoor grows for probably twenty years and never knew all the science available to enhance or improve your grow. I just took some bagseeds and chicken manure and hiked along the river. Never have tried any UK stuff, so can't offer any comparison. But we Americans do like to compete, so look out world American growers are coming.