Surely for a Vertical / Colosseum grow you want a reasonably short Indica Dom variety ?
I am just planning my first Vertical adventure and looking at what strain I have around that will behave herself.... initial thoughts... get something that does not stretch too much, likewise, a hydro system that does not promote too much rapid vertical growth or stretching will be more manageable.....
So, for these reasons I am looking at Indica Dom plants and maybe sacrificing a little yield and speed by using Coco [drip to waste] over trying a Hazey Dom stretcher in an NFT system that may well make her bolt, e.g. put 5" SSH clones in that fly up to between 20 & 30cm when it would be better to use 5" ST3 that all go 17 to 19 cm max......... it is easier to work out vertical spacing ?
Did you ever see SoQuick's Coli or buckets?That guy is bad ass. AK-99. Having that much sativa influence is perfect. You have no veg time and they stretch up fast then bulk out. If doing strait Ak-47 it would still be good but stouter and more squat. BTW sweet tooth #3 is one of my favorite SOGers. If you have it, im jealous! Popped those beens like 8 or 9 years ago. I miss it. I always got over 2lbs a light with the ST3. And fruity too.