‘Karl Foerster’ feather reed grass Calamagrostis acutiflora Type:ornamental grasses, perennials that last Notable Traits:outstanding winter interest Hardiness:Zone 5 – 9 Mature Height:3-4ft Light:part to full sun (4 hours or more sun) Water:drought tolerant Bloom Color:white Bloom Shape:plume Bloom Time:summer Foliage:green Description Upright grass with fluffy seed heads that appear much earlier than other ornamental grasses. 3-4′ tall when in bloom, ‘Karl Foerster’ stays very columnar in habit. Perennial Plant Association Plant of the Year!