Auto is possible Photo?

Some autos take a long time to switch to flower, a lot of mixing of genetics to get them where they are today. Its rare for a breeder to mix up the genetics of their products and ship you the wrong ones. I think they just need a quick push with a light change. To this point though, I had one seed bank send me the wrong seeds from a breeder I liked at the time, they sent me photoperiods vs autos. I never noticed, this was because I grew them on 12/12 photoperiod not knowing much about 18/6, they bloomed like autos so never thought much of it til I noticed the different packaging years down the road for that brand when I reordered more seeds, autos=white black=photos lol. I would flip them to a 12/12, make sure you are still giving them aorund the same DLI so the energy is not lost, this way you can stay at 12/12 so its the same as the light at 18/6 was providing. I think this is a good way to kick them into bloom. Flowering will not start immediately and will take a week or two to show signs it is initiated. Look for extra pistils forming at nodes and stretching. I would still give them the same feed ratios as in veg till after the stretch is done. then mix in the bloom nutrients, if that's how your nutrient lineup works. They will be drinking and feeding more so you will need to water more frequently, in turn this feeds them more frequently if your fertigating every time you water. I'm not a fan of growing things under a photoperiod above 18/6, plants need sleep, all living things need sleep. Flowering stage in photoperiods is determined by length of uninterrupted darkness vs day light length and autos are not bound by this normally. I have no doubt if you let this go long enough it would flower on its own but might as well speed it up and get on with it. Good Luck!

Well, "auto" are photoperiodic plants, but with different periods. When you start them in 18/6 it's the same as if you started normal strains directly in 12/12: the plants will grow until they are uncomfortable and then try to reproduce (turn to flower). If I were you, I'd switch to 24/0 and in a week or two go down to 16/8 to force the flowering.