The leaves of the Cobra Lily Flowering Bulbs can grow up to six feet tall after the spectacular, red erotic flowers that sit atop a six foot red, speckled, wart-covered stalk The Cobra Voodoo Lily is so aggressive it will shade out and over take grass and weeds in the area. You can buy your Cobra Lily from Ty Ty Nursery Today. TyTy Has grown the cold hardy Cobra Lily Flowering Bulbs for twenty years during which time it has survived temperatures of 0 degrees F. The twenty year old TyTy bulb has now formed a giant colony of bulbs as thick as a tropical rainforest.