There are so many colors and sizes of penstemon hybrids. Among the favorites are ‘Firebird’ (red), ‘Midnight’ (purple), ‘Garnet’ (fuchsia pink), ‘Thorn’ (white with a pink blush), ‘Apple Blossom’ (pink), ‘Bev Jensen’ (magenta) and ‘Raven’ (darkest purple). A very floriferous variety on a smaller plant is ‘Pike’s Peak Purple’. All these varieties take heat and cold and do best in full sun with average water.