Hummmm. I just don't know about the window issue. Unless your windows are/were north exposure, the window treatment should have made absolutely no difference. That is doubly true since Utah would have had "inside" treatment, done to keep the warmth in, and that has no effect on UV. Even then, I know for a fact that UV has little if any affect on plants. When people grow under "gro-lights", the spectrum is not even close to the UV spectrum. UV is actually what will sunburn a tropical plant, so one really would not want much of that spectrum regardless. Natalie, you have stumped me.
Perhaps someone out there can shed some light on this matter, no pun intended. Ken
