Its amazing how different the requirements can be from one strain to another. I've had nute burn suprise me a time or two also. Light requirements vary from strain to strain too. I'd been growing an indica strain (bag seed) under some trees pretty well, nice compact, tight buds. Then I planted something different in the same spot, also bag seed, sativa dominant. Tiny buds, light & fluffy. Almost looked like grass seed tassels. That one needed full sun. Sometimes it takes more than one grow to get it right when you go to a different strain. Thats one of the reasons I usually stick to a strain for years once I get one I really like. I don't like surprises, they're not always good.