Here's another "advanced" Autoflower pointer when growing indoors..chuckle.
when you see your Auto beefing up..looking super leafy and stout..you don't want to defoliate to get light down below the canopy..
Paradoxically, you raise your lights (increase distance from the source)...temporarily. In doing so, you create the "stretch" in the plant we are often trying to combat..this will open up the canopy a bit by creating space between the nodes..once you're happy with the stretch...Return the lights to normal level..you will likely want to LST, by tying the growing tip over a bit so that you can keep a significant portion if the fan leaves closer to the light as the side branches grow ..
cheers