Impressive was developed to be hardy enough to be left in the ground year-round in most U.S. growing zones. Introduced in 1957, this time-tested gladiolus opens its dazzlingly bright blooms, 10 to 12 at a time, from mid to late summer. These eye-catching flowers are light pink with vivid pink to red markings, and are ideal in front of a border. We recommend planting a few bulbs each week instead of planting them all at once, to ensure a longer blooming period.Gladiolus nanus