Bluemat Penstemon ‘Waggon Wheel’Waggon Wheel Bluemat Penstemon (Penstemon caespitosus Waggon Wheel) is a petite powerhouse for sun drenched rock gardens, slopes, or crevice plantings. Its tight evergreen 1 2 inch mats are crowned in early summer with soft violet blue blooms that attract bees, butterflies, and hummingbirds. As a Plant Select cultivar derived from the native Penstemon caespitosus, it's bred for reliable bloom, neat form, and resilience in dry, rocky soils. Perfect as