Just judging by bud size, i'd say they could plump up a little more.
Rule of thumb: Harvest when you see around 30% of your trichomes turning amber as that is when they start converting their THC-A to CBD! it is hard to see with the naked eye, so it is recommended to get some sort of magnification such as a jewelers loop or Macro lens for your camera.
Happy Harvesting!
PS. looks like your plant is having some Nitrogen toxicity with the dark green, drooping leaves, but that could just be the lighting and darkness! Anyways. Good Luck