I have grown houseplants all my adult life with great results. In the last 15 years or so, I've lived in places which have the newer UV blocking window glass, and since then almost nothing grows happily on my windowsills.
I firmly believe it is because if of those windows. I have researched this several times over recent years, and not many support my "theory", especially professionals in the window business.
Has anyone here ever wondered about this?
