It is used extensively in the southeast, since a fall seeding will create a lavish spring display, but the plants are unable to live through the hot summer that follows. Common name(s): Papaver nudicaule Flower colours: pink, yellow, orange, rose, white, cream and stunning bicolors. Bloom time: May- July,spring Max reacahble height: 2 feet in height. Difficulty to grow:: Medium Planting and care In warm climates plant Iceland poppies in the fall for bloom the following spring. When the summer heat arrives they will die-out. In cooler climates they can be sown in spring and will bloom the first year – and will live for a couple of seasons flowering in spring and early summer.