I acquired a bougainvillea on Sunday from a local greenhouse. Within a couple of days, the edges of some of the mature leaves are starting to darken, dry and curl. The rest of the plant looks great, I am letting it dry out to a slight wilt between waterings, but it seems each time I water it more leaves become damaged. We don't have any full sun south facing windows, so the plant is in a southeast facing window. Any suggestions would be greatly appreciated. The plant is currently my only indoor plant, it does not have any sign of parasites.