in all honesty im not sure if its enough drop. i figured they needed to drop down to about 60-65 for intermediates to be happy. im just starting with highlanders. i really liked N. bongso, so i researched them and was told they are actually fairly adaptable. so i purchased one from Tony P, an excellent specimen. i wanted to try some other highlanders but figured i would see how intermediates do first so i purchaced the sib and mac(this time not from Tony) because they are from about the same elevations as bongso. so far they are doing quite well. the sib is putting out leaves like mad. the mac and bongso have each put out one new leaf.