Switchgrass Panicum amarum
Other Common Name(s):
Other plants called Switchgrass:
- Phonetic Spelling
- PAN-ih-kum a-MAHR-um
- Description
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Bitter switchgrass is a warm-season ornamental perennial beach grass in the Poaceae family. It is native to sandy dunes and shores in coastal areas from Connecticut to Florida to Texas. Var. amarulum can be found in the same areas, as well as sandflats and sandhills It prefers well-drained, dry to medium moisture soils performing well even in infertile sandy loams. This plant is used as a dune stabilizer along the southern NC coast.
It is a clumping grass and spreads by rhizomes. Cut it back to the ground in late winter to early spring to maintain an attractive shape. It naturalizes easily in the landscape or makes a great addition to a rain garden, or border. It is low water use, low maintenance plant that tolerates dry soils, drought, and air pollution. This grass is also highly salt tolerant.
Seasons of Interest:
Bloom: Fall-Winter, September- Feb
Insects, Diseases, and Other Plant Problems: No serious insect or disease problems. Too much organic material added to the soil can cause it to flop over. It tolerates light shade, but begins to lose form in too much shade, growing more openly and possibly falling over.
Propagation: Rhizomes
- See this plant in the following landscape:
- Cultivars / Varieties:
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- 'Dewey Blue'
- 'Dewey Blue'
- 'Dewey Blue'
- Tags:
- Cultivars / Varieties:
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- 'Dewey Blue'
- 'Dewey Blue'
- 'Dewey Blue'
- Tags:
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Attributes:
- Genus:
- Panicum
- Species:
- amarum
- Family:
- Poaceae
- Recommended Propagation Strategy:
- Division
- Seed
- Country Or Region Of Origin:
- Native to North America, Mexico
- Wildlife Value:
- This is a larval host plant for various Skipper butterflies and the Common Wood-Nymph (Cercyonis pegala) which have one brood from late May to October. Adult Common Wood-Nymph butterflies feed on rotting fruit and flower nectar.
- Dimensions:
- Height: 3 ft. 0 in. - 4 ft. 0 in.
- Width: 2 ft. 0 in. - 3 ft. 0 in.
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Whole Plant Traits:
- Plant Type:
- Herbaceous Perennial
- Native Plant
- Ornamental Grasses and Sedges
- Habit/Form:
- Arching
- Clumping
- Dense
- Maintenance:
- Low
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Cultural Conditions:
- Light:
- Full sun (6 or more hours of direct sunlight a day)
- Soil Texture:
- Clay
- Sand
- Soil Drainage:
- Moist
- Occasionally Dry
- Very Dry
- Available Space To Plant:
- 3 feet-6 feet
- NC Region:
- Coastal
- USDA Plant Hardiness Zone:
- 2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
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Fruit:
- Display/Harvest Time:
- Fall
- Winter
- Fruit Type:
- Caryopsis
- Fruit Description:
- Fruits are available August-December.
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Flowers:
- Flower Color:
- Pink
- Flower Value To Gardener:
- Long-lasting
- Showy
- Flower Bloom Time:
- Fall
- Summer
- Flower Description:
- Flowers bloom July-November.
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Leaves:
- Leaf Color:
- Blue
- Gray/Silver
- Green
- Leaf Feel:
- Glossy
- Hairs Present:
- No
- Leaf Width:
- < 1 inch
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Stem:
- Stem Is Aromatic:
- No
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Landscape:
- Landscape Theme:
- Butterfly Garden
- Native Garden
- Pollinator Garden
- Rain Garden
- Winter Garden
- Attracts:
- Butterflies
- Pollinators
- Small Mammals
- Songbirds
- Resistance To Challenges:
- Black Walnut
- Drought
- Dry Soil
- Erosion
- Pollution
- Salt