The good news is that you are close to harvest.
The bad news is that you look to have a mold problem.
You can use Serenade up to harvest; apply lightly and keep your humidity WAY down. Your leaf shape indicates that the plants are rootbound as well, and the rust brown speckles indicate potassium lockout from low soil pH.
Your strain does not look like a sativa and the fact it is taking so long says that you might have a light leak. Check to see if that is the case, and fix any you find.

Me personally, if I found mold on the leaves of plants that close to harvest, I would consider taking them down early. If you can fix your light leak and drop your humidity to prevent the spread of the mold, even by adding some heat in there during the dark time, and treat with serenade, that would be an option- another week or so and you will be close enough to the harvest window not to lose out too much on yield or effect.