Which vines can withstand full sun in the afternoon, in addition to the heat from an air-conditioner?
That's a challenging site, but there are some vines that will take it. One of the toughest perennial vines for a situation such as this is trumpet vine (Campsis radicans). Hummingbirds go wild for its gaudy 2-inch orange flowers that appear from midsummer to early fall. If you're not fond of orange in the garden, trumpet vine also comes with red ('Crimson Trumpet') and yellow ('Flava') flowers. I need to caution you about this vine, however; it's vigorous, fast-growing, and spreads by suckers and seeds, so you don't want to plant it close to your house's foundation. Passionflower (Passiflora) and climbing rose (Rosa) are a couple more sun-loving vines that will produce an abundance of blooms. Several annual vines can do well in these conditions too. Some of my favorites are black-eyed Susan vine (Thunbergia alata) and purple hyacinth bean (Lablab purpureus). Both need a little extra care to get started, as do most freshly planted annuals, but once these tough vines get going they'll withstand the blazing sun and scorching heat.
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