Ok buddy, listen up. Now that it is spring, going on summer, the days WILL get longer and your plants are going to revert back to their vegative state BECAUSE the days are getting longer and nights are getting shorter.

If you wanted short plants you should plant them in July. Typical growing season is from May to October give or take. Planting them in Feb. doesn't mean they will finish in June. It just doesn't work like that.

And autoflowering does mean something!! It means they will flower regardless of the light cycle. Do some research on light cycles and you may have a better understanding.