• 20949 US Highway 17 N Hampstead, NC 28443

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ornamental grass

Dewey Blue Switch Grass

Panicum amarum 'Dewey Blue'

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Dewey Blue Switch Grass (Panicum amarum 'Dewey Blue') at Pender Pines Garden Center

Dewey Blue Switch Grass

Dewey Blue Switch Grass

(Photo courtesy of NetPS Plant Finder)

Dewey Blue Switch Grass (Panicum amarum 'Dewey Blue') at Pender Pines Garden Center

Dewey Blue Switch Grass foliage

Dewey Blue Switch Grass foliage

(Photo courtesy of NetPS Plant Finder)

Height:  5 feet

Spread:  30 inches

Sunlight:  full sun  partial shade 

Hardiness Zone:  4a


Native to coastlines that are sunny, sandy, dry, and infertile, so this ornamental grass does best in these conditions; but will also thrive in average to loamy soils if there is good drainage; very wind and salt tolerant

Ornamental Features

Dewey Blue Switch Grass features airy plumes of tan flowers rising above the foliage in late summer. Its attractive grassy leaves are steel blue in color. As an added bonus, the foliage turns a gorgeous gold in the fall. The tan seed heads are carried on showy plumes displayed in abundance from late summer to mid fall. The tan stems can be quite attractive.

Landscape Attributes

Dewey Blue Switch Grass is an herbaceous perennial grass with an upright spreading habit of growth. Its relatively fine texture sets it apart from other garden plants with less refined foliage.

This is a relatively low maintenance plant, and is best cut back to the ground in late winter before active growth resumes. It has no significant negative characteristics.

Dewey Blue Switch Grass is recommended for the following landscape applications;

  • Accent
  • Mass Planting
  • General Garden Use

Planting & Growing

Dewey Blue Switch Grass will grow to be about 4 feet tall at maturity, with a spread of 30 inches. It tends to be leggy, with a typical clearance of 1 foot from the ground, and should be underplanted with lower-growing perennials. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 15 years.

This plant does best in full sun to partial shade. It is very adaptable to both dry and moist growing conditions, but will not tolerate any standing water. It is considered to be drought-tolerant, and thus makes an ideal choice for a low-water garden or xeriscape application. It is particular about its soil conditions, with a strong preference for sandy, alkaline soils, and is able to handle environmental salt. It is somewhat tolerant of urban pollution. This is a selection of a native North American species. It can be propagated by division; however, as a cultivated variety, be aware that it may be subject to certain restrictions or prohibitions on propagation.

Hardiness Zone Plant Height Minimum Sunlight Soil pH Preference
Accent  Massing  Garden 
Flowers  Fruit  Foliage Color  Fall Color  Texture  Bark 
Ornamental Features

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