Gladiolus ( Phyllis M Gladiolus )
These cormous perennial are grown for their sporty spiked peak , which open up from the bottom upwards . Foliage is strap - similar and erect . Gladiolus look best when constitute in large groups . It is common to jeopardize them . Soil should be productive and well drained and illumination may be full sun or partial shade . Hardy in zones 8 - 10 , they may be plant in other areas as yearbook or even protected with a thick level of mulch ....