Though Iceland poppies are true perennials, they are usually grown as annuals or biennials. The sweet-scented blossoms sit atop two foot stems that rise from low-growing, clumped foliage. The blossoms are abundant and brilliant, and create a striking display. The petals have a crinkled silk appearance, and come in shades of yellow, white, orange and pale red. Most are single forms, but semi-doubles are sometimes seen.