The rapid vertical growth most cannabis cultivars undergo in the first 2–3 weeks after switching to a 12/12 light cycle, driven by a surge of gibberellin hormones in response to the change in photoperiod.
Dakota mentions observing stretch at day 11 flower as an exciting early-flower indicator: 'I love this phase because you're starting to see the stretch, the growth, the little buds forming.'
Discussed in: Ep 002