Hi Trace, it would help if you told us your location --- at least what state & what portion of that state. It's possible, especially if you're in Florida, that they are suffering from nematodes but we would need more info. to determine anything really. How long have you had them? What kind of soil were they in when you got them? Did you re-pot them or put them in ground as Annie asks?
I'm a little confused --- do you mean none of the other heat tolerant/drought tolerant plants will grow for you either or is it only the bougainvillea that won't grow?
