Boomer: Consider a honeysuckle vine (genus lonicera), but NOT the invasive Japanese species (l. japonica). The coral honeysuckle (lonicera sempervirens) is a Florida native. It won't provide the "WOW" that a bougainvillea in full bloom will elicit, but it will have scarlet flowers and you'll enjoy viewing the ruby throat hummingbird as it goes from one tubule to the next sipping the nectar. It's evergreen.
There is a cultivar named 'Major Wheeler' that is allegedly very floriferous but I don't know if it does well here. I've attached an article by a Florida resident commenting on another lonicera species that successfully grows at Leu Gardens.
Trumpet vine has a reputation of being invasive. A better behaved relative, and one I read of often, is 'Tangerine Beauty' cross vine (bigonia capreolata). It's reported to be a slow grower but can eventually reach 30' plus. It also draws the hummingbirds.
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