Crinums. (Crinum spp). The crinum that's hardiest to cold is appropriately named the hardy crinum; it's worth growing not only for its pink flowers, but also for its twisted grayish-green foliage. 'Ellen Bosanquet' is an old Southern favorite with untidily floppy leaves and spicy, fragrant pink blooms. Gardeners in the tropics are no doubt familiar with the ridiculously large grand crinum, which reaches 6 feet tall and produces many sizable spidery white flowers.