Panicum amarum ‘Dewey Blue’

(Dewey Blue Switchgrass)


Hardiness Zones:

 2a  2b  3a  3b  4a  4b  5a  5b  6a  6b  7a  7b  8a  8b  9a  9b

Quick Overview:

‘Dewey Blue’ is a cultivar that typically grows 3-4’ tall and is noted for its attractive powder blue foliage and fountain-like form. Blue-tinged flowers appear in late summer to early fall, followed by beige seed heads that persist well into winter. Stems reportedly retain vertical form without flopping throughout the growing season and into winter.  (Courtesy of Missouri Botanical Gardens Plant Finder)



Grow in average, well-drained, dry to medium moisture soils in full sun to part shade. Performs well in infertile sandy loams. May flop in overly rich soils. Will grow in light shade, but begins to lose form in too much shade, growing more openly and possibly falling over. Grows primarily in clumps, but may slowly spread by creeping rhizomes. Cut back clumps to the ground in late winter to early spring.  (Courtesy of Missouri Botanical Gardens Plant Finder)

Additional information

Common Name

Dewey Blue Switchgrass

Botanical Name

Panicum amarum 'Dewey Blue'


1 gallon

Evergreen or Deciduous


Hardiness Zone

2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b

Growth Rate


Light Requirements

Part-sun, Sun


3 to 4'


2-3 ft.

Soil Condition

Well-drained to dry

Water Needs

Average to low

Blooming Period


Flower Color

Pale Blue



Foliage Color

Blue -green

Deer Resistant


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