Whats up?

12/12 is not the best for autos. At about 3 weeks is when my autos just barely started to show if I remember right.

Switch them back to 20/4 and give them more time. If they dont show signs after maybe 4 weeks or a tad more then they might need a 12/12.

I had two autos that apparently were mixed up at the breeder and they are some type of reg plant and after 5 or so weeks vegging while the rest of my autos finished I got to put them under 12/12.