if they aren't flowering, lower the # of light hours by either putting them in a dark shed every evening, or caging with chicken wire, and 'bagging'- heavy duty trash bags split and duct taped together to make a bigger bag...drape it over the caged beast every evening, and take it off 13 or more hours later. don't fret about a small amount of light creeping in the bottom...I haven't had ANY problems with this trick.