the shade doesnt have anthing to do with the light schedule. shady light is still light in the plants world. last week of july to the first 2 weeks of august. like most everyone said. stress can trigger and early flower or a late flower. and those girls usually end up herming out.
I made observations similar to Newbietoo . . . so it may be that there is also a differing degree of darkness that different strains/phenotypes consider darkness, and therefore begin producing the auxin . . . maybe, just as there are many different maturity dates, so there are also just as many different given days when particular individuals trigger into flowering phase.
also throw into the mix the latitudinal location of the plant and the corresponding angle of sunlight against the earth . . .
so the answer is . . . there is no concrete answer . . .
PS - hey Newbietoo . . . for a 3rd year grower, you sure got some sick lookin plants !! :joint: