Pretty sure I have a Calcium def, treating with foliar spray, and will water with calcium enriched water.
Calcium seems to have help give strong surge/boost towards harvest. New bud growth came in strong this week.
@Kilbarrack,
I'm at day 59, just now starting to see some light purple in the buds, but not too much. Mine is running a little behind, overwatered her and took about a week to fully recover and she stretched too close to my lights and got a little light stress which has stunted her some. I'm really hoping she only has about a week left now. Stem is getting some purple to it so I expect the buds to display more purple as well