When to treat a non-flowering auto as a photo? After 'flipping' then what; <12 or 18-24 hours of light/day?

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What are current views regarding when to treat a non-flowering indoors auto plant as a photo plant? And if treated with light reduction to induce transition to bloom, what does that actually involve and what comes after flipping? [I am ignorant about photo plants. I asked much the same questions over a year ago, but only 1 person responded].

1) How long (weeks) should one give a healthy not-yet-advancing-to-bloom auto plant a chance to move into bloom on its own? When should a grower give up on it autoflowering?

2) Once a delayed plant 'flips,' starts to form buds, whether on its own for flipped by light restriction, then what? Can/should you go back to say 18-24 hours/day of light or must the plant be given <12 hours/day, all the way to harvest? Should nutes be adjusted, such as do you keep to the same bloom booster regimen used with autos?

3) Any other guidance, best practices, etc. for dealing with this problem?

For example, I have a Gorilla Cookies Auto/Fast Buds plant that hasn't advanced to bloom yet at about 50 days. There is no other problem with the plant. It's healthy, large (for my grows) and growing daily. Other plants in the tent planted the same day, same media, nutes, etc. are well into bloom, with one likely to finish in 10-14 days. If I don't see buds starting to form, when should I presume the plant is a defective auto and needs to be manually flipped, with how many days <12 hours/day light? Can/should I let the plant keep on growing and flip it when I get concerned about it taking up too much space or getting too tall? And after flipping, what light regimen should I use -- my usual auto or <12 hours/day; all the way to harvest?
 
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Im not an expert but Ive been on a few threads that have had this issue.

The consensus I've gathered is you can sometimes initiate flower by just dropping 2-4 hours off the light cycle to get it to initiate a flowering response, but most people just go to 12/12 to be safe.

As to the length of time you need to run a diminished cycle I think is up to you. If you drop it to 12/12 and you get your typical first few budsites pop up, you could slowly ramp it back up to be safe.

Everything I've seen says after the flowering cycle is in swing you can go back to a normal autoflower light schedule.

I think @Lil Dab @JP1 and @Frankthetank have been on threads where I've seen people discussing this before and nay have 1st hand experience
 
Im not an expert but Ive been on a few threads that have had this issue.

The consensus I've gathered is you can sometimes initiate flower by just dropping 2-4 hours off the light cycle to get it to initiate a flowering response, but most people just go to 12/12 to be safe.

As to the length of time you need to run a diminished cycle I think is up to you. If you drop it to 12/12 and you get your typical first few budsites pop up, you could slowly ramp it back up to be safe.

Everything I've seen says after the flowering cycle is in swing you can go back to a normal autoflower light schedule.

I think @Lil Dab @JP1 and @Frankthetank have been on threads where I've seen people discussing this before and nay have 1st hand experience
How long should one wait for the plant to move into bloom on its own, before forcing flipping? Or do you go by size, flip it when it's starting to get too big?
 
That is a long vegging auto….it vegges for what seems like forever, then rockets into flower. If you try to flip an auto that’s not a photo, it slows down, and stretches…. I’ve rarely encountered the defective auto beyond the early days of autos, or from home breeders.

I would let her do her thing, and leave the light for the other plants….personally.
 
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