Heat-resistant plants we have now

Lewisia 'Sunset Strain'  Gorgeous perennial jewel of the Pacific Northwest is extremely hardy, long blooming and low maintenance. Blooms May to September in sunset colors (apricot, tangerine, yellow) Lewisia benefits from some dryness, plant them in a clay pot with some gravel added, in the cracks of a rock wall or enjoy them in a well-drained rock garden.

This an Echium, called "Red Feathers".....Come to the Cottage to get this great summer bloomer! 
Another Echium, Blue Steeple. Electric blue-purple spires up to 12' tall! Generally blooms in spring of the second or third year. Rising up from the seemingly innocuous foliage, the florescence acts as a massive floral beacon for bees, butterflies, hummingbirds. 
Cordyline Renegade has glossy, chocolate-colored leaves. This super drought-tolerant plant is perfect for adding color & texture to almost any garden. Grows 2-3’ high & wide with long, broad, arching leaves emerging grass-like from a central trunk that can reach up to 2’ high over time. In Winter, small fragrant creamy lavender blooms emerge on an airy, multi-branching flower spike.

 And last but not least, Lepechinia hastata: Heat & drought tolerant, evergreen & amazingly hardy (to 0°F), this unusual & easy to grow Salvia relative puts on a stunning display August-October. Plentiful, showy, 12” upright open spikes of deep magenta-rose create a cloud of bloom 3’ across above silvery, mint-scented, ground-covering foliage. Hummingbird favorite! Happy in poor soil with good drainage. It prefers full sun but can take a bit of shade.