Between dogs and grandchildren, I try to watch what I plant! Oleanders are on my caution list, plus I don't really have the room to let them 'shine'. Allamanda is another I was always told to watch out for. Will have to research that to find out if its true.
Crepe myrtles: Oh God, how folks maim them down here! It ought to be a crime. Everyone seems to want them to have one main trunk, then branch out at the top. Or when they start getting tall.... they just cut them flat acros the top. But then, they do that to all kinds of plants and trees. Heaven forbid, something should grow NATURALLY! It wouldn't fit in with their landscaping. My idea of yard design is to move things around till they can do their own thing in peace. ha ha ha
Sweet peas. Mmmmm! My aunts up North always had the most beautiful smelling sweet peas. All were old varieties. And Aunt Mae always grew the best, and hollyhocks too! Got the seed from her grandmother for both. I was given some of the last seeds.... and had no luck at all here on the central Gulf coast. A lost piece of family history here. Hope my cousins are keeping them going!