The big sativas from Greenhouse will be tough to grow (especially from seed) with only 3.5 feet of vertical height. You will need to top and train them aggressively. This is the type of plant you can grow in a big pot with just 4 under a single 1000W light - use trellis to grow her wide and low - rather than tall and skinny. You can yield 2 - 4 oz+ per plant using this method. If you were working with clones - you could do a single cola, dense SOG - turning your clones down at 6 - 9". Pack em in at 4 per sq foot in 6" pots. Using SOG methods you can save yourself about 3 weeks of veg time vs going with few large plants. The good news is your light density will be high with low hanging lights. (just keep it cool)
I personally, was major disappointed with the SLH from GH. I know the Cannabis Cup is rigged and all - but I figured that the winners would, at least, be higher quality smoke than what one could find in any Cali collecitive? On that note, it's hard for me to reccommend messing around with GH sativas - especially with limited vertical space... but I'm not going to try and talk you out of it (somebody tried to talk me out of growing it too, but I had to try for myself). Good luck!
