Calamagrostis acutiflora Karl Foerster
Karl Foerster Feather Reed Grass
|Zones||5 - 8|
10 to 20"
20 to 30"
30 to 40"
40 to 50"
|Mature Plant Size||48-60" tall 24" wide|
|Bloom Time||Feathery plumes emerge in early summer and ripen to handsome wheat-colored seed heads by fall.|
USDA Hardiness Planting Zones
To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.
- If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
- If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).