Thanks for the reply. I'm sorry, I haven't grow anything but photoperiod. my photoperiod got that tall.They froze in mid-october that's why I want to do auto this year. 200cm is what the seed company claims I might not be able to do it . I saw that somebody had missile 33 that did nine foot tall in the Midwest. I'm guessing that's about three hundred and fifty centimeters I was going to try some of those too but I,m worried about quality . I,m at 43 in the upper Midwest . I want to plant them thick enough so I don't have to pull weeds all summer long. Your 150 cm plants how big at the base were they?