IMO ureapwhatusow is spot on really.
From observation, not real proper scientific test, 15cm2, 4pp sq ft. 49 ppsm, 7x7 SoG gives slightly higher yields than alternatives with less plant numbers, given that all else is well and you can get 49 cuttings growing evenly.
The difference is then magnified when you add in the extra days lost vegging, that also use 50% more light.
My late, great mate PMS did a 9x9 11cm2 SoG, 81 plants psm with his old Swazi strain, got over 1000g with 2x400w 15 years ago. As ureapwhatusow says, the real trick is actually getting it running right, that way you get the Max and that is trickier with a SoG IMO.
From what I saw, the whole crux is getting the mother/cutting/propagation/rooting/flowering stages optimised, perfected. The ultimate potential is far above what people are talking about.
From observation, not real proper scientific test, 15cm2, 4pp sq ft. 49 ppsm, 7x7 SoG gives slightly higher yields than alternatives with less plant numbers, given that all else is well and you can get 49 cuttings growing evenly.
The difference is then magnified when you add in the extra days lost vegging, that also use 50% more light.
My late, great mate PMS did a 9x9 11cm2 SoG, 81 plants psm with his old Swazi strain, got over 1000g with 2x400w 15 years ago. As ureapwhatusow says, the real trick is actually getting it running right, that way you get the Max and that is trickier with a SoG IMO.
From what I saw, the whole crux is getting the mother/cutting/propagation/rooting/flowering stages optimised, perfected. The ultimate potential is far above what people are talking about.