This photoperiod is currently being grown in a ten...

They will flower with such a sudden drop in light hours.Put those autos down,ha.They have their place but 90% of the time photperiod are much better to grow.They more stable and you have more control.Are you expecting your light hours to increase where you live?If you aclimatise them lowering the hours over a few weeks and waiting for the outside light to increase you'll be ok but that depends on light hours.Cannabis plants are so sensitive to light.You'd of been better doing it the other way around.The best thing about autos is being able to start them outsided at this time of year.

Hey Growmie, this seedling is showing early signs of nutrient deficiency or pH imbalance, likely nitrogen deficiency based on the fading green/yellowing of the lower leaves.

oops, obviously you may not be from the US, so i'm sure you'd recgonize to adjust the suggested search phrase

The flip to flower is variable and starts around 10 hours of darkness, so they'd probably go into flower almost immediately when you put them outside. Hours of darkness is what controls flower phase, not hours of light. You can trick it by applying light and shortening the dark cycle, if need be, or keep it inside until it is closer to the size you want. You'll still get at least 4 weeks of vege growth before it stops, even if it goes into flower immediately with outside schedule. If worried about the average amount of light it receives outside, google a 'regional US DLI map' ... should find some by month, so you may need to look at a couple.

Where I am at, outdoor falls right before 14 hour days. You should be fine with 13 hour days, should be fine with red and such in the AM to not allow hormone buildup to initiate flower. Like others said, you'd be best served being safe indoor another week or two.

If you have space inside then leave it for a bit longer.

Me too, from the 20h light to 13 h light could cause flowering… don‘t know if I would transition them…

I’d let it grow a bit longer until you have 14 hours of sunlight. How are the temps at night. Above 60 degrees F? If it were me I’d keep it on the safe side to avoid the possibility of a slow start or it trying to flower out.