can't really tell but I'd cut down as there's no real benifit to leaving it out, it won't grow in that cold a temperature.
You might want something that matures earlier next year.
I do, to Pro Mix. I recycle it after the grow by dumping the old soil into a tub of water and skimming it off (it floats !)
Whether it is a benifit or not I don't know, I'll continue to do it.
if they're rare then you can't buy them anywhere, it's hard enough getting the most popular strains.
anyways check out this thread https://www.rollitup.org/seed-strain-reviews/186536-top-10-most-potent-strains.html
better than nothing I guess. standard MH (which that almost certainely is) has a very poor reaction with plants. 6500 K cfls are best for a low watt grow.