40 Perennial Plants to Create Your Perfect Summer Garden

36. Poppy

While many varieties of Poppies, including the infamous Opium Poppy, Papaver somniferum, are not hardy in the United States, there are varieties, including the Icelandic Poppy, that can overwinter even in harsh conditions. The Icelandic Poppy, as its name might imply, cannot tolerate heat so gardeners in widely variable climates like the

Just as the name sounds, Midwest gardeners should avoid this variety as it could get scorched. More temperate climate gardeners, however, will be rewarded with papery, delicate flowers on comically long, prickly stems.