Best way to figure it is to guesstimate based on the type of pot, Indica or Sativa.
indica and Indica Dom plants run 55-60 days on seed websites, add a few weeks, they make the claim for growth in optimum conditions.
so,
indica 8 weeks +
sativa 12 weeks +
crosses, well I just don't know.
Please take better photos with no HPS lighting.
I use a loupe to check Tricomes, I hold the loupe tight to my camera lens and get good Macro photos.