Mina lobata
Clematis (many varieties)
Aristolochia
Passiflora
Thunburgia
Solanum jasminoides


So many, not all hardy to your zone, but treated as annuals.

On Mon, 8 Sep 2003 20:35:39 -0400, "pelirojaroja"
opined:

I love the Bouganvilla vine, but I live in a somewhat windy Zone 6. No way
to have one in the sunny spot I'd like one. Any suggestions on a good
substitute -- one that gives a good flush of flowers (bracts on the
Bouganvilla, actually)? Something other than Trumpet vine/Morning Glory?

-- Much thanks,

-- pelirojaroja
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"There is a garden in every childhood,
an enchanted place where colors are brighter,
the air softer, and the morning more fragrant
than ever again."

-- Elizabeth Lawrence