Today I saw this Advance Nutrients fert that was like 2-2-40 I am using this stuff called Awsome Blossoms that is 2-2-11 Now with only a few weeks to month to go is it too late to use this new stuff. Also my babies have black burn spots on the leaves that look like fert burn, but probably just from the sun burning the dew spots as I found someone elses patch and they have the same thing happening to thiers.
You could and see what happens, but depending on what strain you're growing there might not be much left for the plant to produce. On the other hand you might have a late bloomer on your hands, and a little bloom enhancement might work to your advantage. I'd say that if you get the pH just right it might help. Are you intending to flush before the last couple weeks?
Oh yeah a flush will be in order.......I learned that the hard way. These are definately late blooming NLxHash plants.