Gladiolus ( Ermal Gladiolus )
These cormous perennial are mature for their showy spiked flowers , which open from the bottom upwards . Foliage is strap - like and perpendicular . Gladiolus look best when planted in large groups . It is common to stake them . grunge should be productive and well drain and visible light may be full sun or partial spook . Hardy in zones 8 - 10 , they may be planted in other areas as annual or even protected with a thick bed of mulch ....