Alternating nodes now....

my tallest plant has two alt nodes i just
noticed this but my other plant which is one inch shorter now i should find the sex
of the plants through preflower process
correct?????????????????

Look at the 5th or 6th node. 30 days from sprout they show.

I too have alternating nodes, but still no preflowers. Is it because I am LST'ing and tieing the main stem around the diameter of the pot? I sprouted back in November and its starting to really bush up with many tops.

I get pre-flowers every time i grow. Ya may not be looking in the right place.

5th to 6th node