I am currently planning for my next grow of autoflower DDAs. I am going to germinate from seed and grow in 5 gallon pots using 25% perlite, 37.5% FFOF and 37.5% FFHF soil.
What avarage dimensions per plant should I expect during late bloom if I quadline and all goes well?
Maybe 2 feet diameter and 3 feet height?
The pictures SweetSue posted in #3,427 of this thread (<<<Link) were of a friend's DDA. It was in a fabric five-gallon GeoPot with the same basic mixture that you intend to use. He did minimal training (and basically only used a quarter of the manufacturer's recommended amount of Osmocote Plus for nutrients), so you might expect yours to be somewhat larger - or at least wider - under optimum conditions. For scale, I believe the closet it was being grown in is three feet wide (well, deep, but he was standing sideways when he took the picture). As you can see, it's practically touching those two opposing walls.
For lighting he used a Mars-Hydro Mars II 900, which I believe is around 354 watts or so, and the LED panel was directly over that plant (because he only grew the one).
Oh, and I think the lack of scent mentioned in that post might be attributable to insufficient nutrients in mid-late flowering, but that's just a wild guess. I didn't monitor the grow, so for all I know, he might have had an O₃ generator running nearby, lol.