Flower at day 22?

[CannabisMingus]

OK - new one on me. The plant on the left and closeup in an American Pie Auto (Pyramid Seeds) at day 25. It began flowering at day 23 (probably more like day 22 but I wasn't paying close enough attention).

This is my first serious attempt at an outdoor grow. Using Kind Soil in bottom 30% topped with Roots Organic. Water only (6.5). Plant looks otherwise healthy if a bit undersized - which I am attributing to lack of sunlight during veg (most days have been cloudy). Still lots of clouds so I am running it outside during the day (unless raining heavily) and then an extra few hours (until midnight) under (3) 17w led floods (5000k) . For about a week I had (1) 17w 3000k flood light in the mix, but it's hard for me to believe that would have induced flowering.

Has anyone had such an early flower? Causes? Grower error? Genetics? Thanks in advance for your input!

 

[423]

Since thats outside I would think its just fast genetics.
Ive got an auto that started about 20'ish days old starting the streach and flowering. It's suposed to be a fast auto already, but I think changing mine from 24/7 to 18/6 speed that up. Could be a coincidence or not.
I think light scheduals make more difference in auto's than seems to be accepted.