Ca++
Well-known member
That study is quite good. They don't fully recognise it, but they show the slower transition, leads to less rushed plants. That can still devote some time to getting bigger. It's seen in the plant spacing, the plant size, the slow response times, and reported puzzlement over how the dli increase alone, can't explain the bigger yield.And this on flowering at photoperiods longer than 12/12.
Longer Photoperiod Substantially Increases Indoor-Grown Cannabis’ Yield and Quality: A Study of Two High-THC Cultivars Grown under 12 h vs. 13 h Days - PMC
Indoor-grown Cannabis sativa is commonly transitioned to a 12 h daily photoperiod to promote flowering. However, our previous research has shown that some indoor-grown cannabis cultivars can initiate strong flowering responses under daily ...pmc.ncbi.nlm.nih.gov
It might of been nice if they kept the 13h plants going, until they showed as many brown hairs as the 12h did at chop. However, it's very clear what is going on there. It's basically bigger plants, that really wanted to go a bit longer.
This is useful if your veg time can be shortened, and those days given to bloom. Bloom using less power than veg. Rooms not full enough, can also be stretched out a bit further. When plants that are so stocky that lots of excess bottoms get chucked away, then spending more time in the elongation stage can fill spaces without growing so much waste.
There is a useful tool here, for those that can utilise it. It's not free weed for everybody though.