A variation of the gorgeous Penstemon spectabilis  or showy penstemon  P. spectabilis ?Snow Dragon? is a rare beauty  flaunting petals of sparkling white instead of the sunset violet-blue of the species.  ?Snow Dragon? also tends to grow more vigorously and have a fuller  bushier form than showy penstemon.  The pure white blooms are abundant in spring and summer about April through June  contrasting nicely against the luxuriant green foliage.  This perennial native plant grows to be about 3 feet high and wide  a nice addition to the back of a flowerbed or tucked into a rock garden.  Penstemons tend to grow naturally in dry  rocky  well-draining places  often found basking in full sun on gravelly hill sides.  Penstemon ?Snow Dragon? may tolerate a little shade  but produces the most flowers when given full sun.  Fast growing and hardy  once established this flowering native needs supplemental water about once a month.