The Western Columbine plant grows up to 30" tall and has beautiful red and yellow flowers, about 2" long, which can be seen from April to August (with some variation between regions). Technically, the red or orange spreading outer parts of the flower are sepals, and the yellow inner parts are the true petals. The petals bear spurs that attract the Sphinx moth, the plant's sole pollinators. Hummingbirds are also attracted to the Western Columbine in gardens. Blooming Time: Mid-June through July.