Considering all the other ridiculous things people grow as annuals in places where they aren’t hardy, why not Restios? Some are hardy to zone 7, but even those that are decidedly more tropical could vie for attention with the tender architechtural plants that are currently hot.
I’ve only seen these in periodicals, but several species are listed in Cistus Nursery’s catalog. They seem very popular in bay area. Most are native to South Africa and there are some closely related genera that are equally new and interesting.
Any one have experience with them in the PNW?