A few months ago I read an article about the Florigen hormone and how it is induced by reduction of light. I did an experiment on my just finished grow by reducing the light time below 12 hour incrementally by going 11, 10, 9 in 1 hour steps each week to see if more of the hormone would give more flower. I did not have a control plant and my results were far from conclusive. I have no idea if more Florigen was actually produced by this regimen. I had a bounty of buds from 4 plants. Interesting to note that the 3 from seed each gave twice the yield as the 1 clone from one of them. I don't know if that is common for clones harvested at the same time as the mother or not. I would think not??
Not sure how this relates to your thread but hope it helps. Is it used commercially for crop application like set spray on tomatoes? Wouldn't that be great...just spray your plants with canned hormone and they flower now...ok I'm high,bye