I wait until the 5th node and bend the top down so the other arms can be even with the main top. Cannabis plants have apical dominance, meaning they will give most of their resources and grow better at the top of the plant, so try and keep the canopy even. Once you bend the top down the sides will catch up quickly!! Put your hands on the plant as often as possible. Bend the stems back and forth to strengthen them throughout the grow. Happy growing!! 💪