When the plant is uniformly browned and dead-looking, cut its foliage, including both dead leaves and stalks, to at least 2 or 3 inches above the crown. Prune poppies in late spring after they are finished blooming to promote their health during the following growing season. Once pruned, poppies go dormant and begin to die back.
Throughout the summer and fall when the poppies are dormant, water them for five minutes once a month,. Failing to let poppies die back before pruning can prevent them from blooming in subsequent years. Therefore, be sure to let the plant die back before removing the flowers or flower stems. When pruned and cared for properly, this hardy perennial grows for many years and produces stunning blossoms every year.
Poppies grow well in multiple climates in the United States with hardiness ranging from Zones 2 to 9.. With little maintenance needed to obtain bright, vibrant blooms, poppies are great for filling space and adding color to many different types of gardens. Poppies, sometimes called Oriental poppies, are native to Asia and characterized by paper-thin blossoms in a wide array of colors, including orange, red and yellow shades. Flowers typically grow up to 6 inches across.