Why is this not flowering

Some autos just refuse to flower, even when everything seems right. Usually, autos start flowering around day 28–33, but I’ve also seen phenotypes that took much longer, even around 60 days, or never really flowered at all. I used to grow autos myself, but eventually moved away from them because there can be too many variables and question marks. One thing I’m curious about, though: why is the flowering plant so yellow at the top while the lower growth remains so green? It makes me wonder whether there could be a nutrient uptake issue, but I wouldn’t want to jump to conclusions based on a few pictures. I haven’t read through your full diary, so I’m only going by what I can see here. Just curious, not trying to criticize your grow! 👊🌱

did you do 12/12 for a short period of time then go back to 18h? If so, that's probably the problem. Can't have light pollution... it's a hormonal feedback loop and the hormone is exclusively produced in the dark. It only reaches necessary levels to trigger flower if it's 10+ hours -- there is variety in that, which is why people use 12/12 as it safely covers all the variety. if a so-called auto doesn'tflower after a long time, it's likely a mispackaged photoperiod or they had foreign pollen contamination during the seed-making process.

Any better picture pal too high and farway and too close.. Doesn't look happy

Wrong Seed .. One Photoperiodic in the bag … all Genetik things … what ever .. Test 12/12 to Switch

Pics 2 and 3, the plant that is not flowering, show a plant that has symptoms of long term excessive nitrogen. Long term excessive nitrogen can delay flowering and even stop flowering from occurring at all..................ask me how I know!

I'm flowering my autos under 12 hours. They start in my veg tent under 18 hours though. I just moved them to my flower tent to make space. its was the right call to move it to 12 to see if it was a photoperiod by mistake. Maybe its just not ready to flower yet! lol Longest i had a auto veg was 5 weeks though. I had a photoperiod that was in an auto pack. my overdose diary. Took until week 8 of veg to figure it out lol .

It’s an 🚗? Biggest mistake people do with 🚗 is to switch from 18 to 12, 🚗 needs 18 in full cycle. Good luck 🍀

Hola amigo, puede ser contaminacion luminica o la semilla no era auto, asegurate de que en el armario no hay fugas de luz, te esperas un poco mas y tanto si es fuga como si es fotoperiodica florecerá, estan preciosas, gran cultivador amigo saludos y feliz cosecha 💚🍀🌱🍀💚