They develop some red tones in the fall, but blacken with heavy frosts. They regain their color in spring. Each flower is held up on a stalk about 4 to 6 inches tall. The flowers have 8 whitish petals and a bright yellow center. The flower stalk grows as the seeds are forming, rising to about 10 inches tall.
Seeds blow away in late summer.
Easy to grow. Grows best in well-drained soils. The dried seed stalks may be pruned off to obtain a neat appearance, or the stalks may be left alone to provide winter interest and help hold snow on the plant. Prune back plant stems to control spreading. Plants have not been invasive in my garden.