Karl Foerster Feather Reed Grass is one of the most popular ornamental grasses available! The upright habit of this grass makes it useful for screening, and for a tall vertical accent in perennial beds and borders. The leaves on Karl Foerster are about 3' tall, while the wheat colored flowers (feathery reeds) can reach up to 5' tall. Karl Foerster was named the 2001 Perennial Plant of the Year by the Perennial Plant Association! Ornamental Grasses are often among the latest perennials to emerge in the spring garden, so if you don't see growth until late May or June that is completely normal.