not true, theres a thread on here i recently saw that is a easy hydro setup that could easily work outdoors, just take a bucked drill a hole into the side few inches up, then put the plant in somethin like 4 parts perlite 1 part vermiculite,if i remember correctgly, then water the plant in the bucket till the water comes out the hole, then just let the plant grow and the tap will eventually reach the water, but u gotta water it alot