Hey friend,
Mooncat offers a decent range, in my opinion.
Have a google for "VPD" and how it affects the growth of cannabis plants for more info.
Looking at your diary, I would recommend giving your plant and longer wet/dry cycle now that she is of substantial size. Maybe, more water less often, cannabis plants love a bit of a dry cycle, this keeps the roots oxygenated and encourages them to branch out in search of water.
Hope this helps,