Where can i find oleanders in NYC? I'm also looking for bougainvilleas?

Logees in Danielson, Connecticut has a great deal of tropical plants. I am pretty sure you can find what you are looking for there. They have their greenhouses in CT and do have a mail order business as well. If you are ever in the area, this is a MUST to stop in and tour their greenhouses. It is a garden wonderland where you will be in awe at the sheer magnitude of their selections. If so, go with comfortable shoes, a full stomach and an empty bladder cuz you will be there for hours!! Good Luck.