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Panicum virgatum 'Shenandoah'

Common Name(s):

Tall panic grass

Thatchgrass

Synonym:

Chasea virgata

Wild redtop

Flower:

Pink

Blooms :

Jul

to:

Oct

Spikelets reddish pink .1-.22" long by .6" wide, showy

Botanical Description

Fragrant?

NO

Family:

Poaceae

Grass

Foliage:

Green

Bluish green leaves turn burgundy red by late June

Fall Color?

YES

Leaves turn yellow, sometimes with orange tints

:eaves fading to tan in winter

Photo by: 

Heading 6

Seed plumes persist well iinto winter

Oregon Native?

NO

West State Native?

NO

Origins:

North America but most common from central great plains states

Site Selection

Minimum USDA Hardiness Zone:

5

Water Needs:

M

Sun Needs:

Full Sun

Deer Resistant?

NO

Firewise?

YES

Height:

3-6'

Spread:

2-3'

Growth Rate:

Fast

Native Habitat:

Tallgrass prairies in North America

Soil:

Average, medium to wet soils

Care Recommendations

Maintenance Level:

Low

Fertilizer:

Requires no fertilization

Mulch:

Well-cured shredded wood, pine bark, pine straw

Pruning dead foliage back to ground in early spring, dividing clumps every 3-4 years, ensuring full sun to prevent flopping

Long Term:

Winter:

Leave foliage and seed heads for winter interest, food for birds, cold weather insulation for the roots

Spring:

Cut back the foliage to about 4-6 inches in the spring before growth resumes. When foliage is removed, spring growth will begin earlier. Old foliage left on the plant can delay the crown?s warming and subsequent growth by as much as 3 weeks.

Summer:

None except occassional watering if overly dry

Fall:

Grasses do not need to be cut down before winter. In fact, they are attractive when left standing and the foliage helps to insulate the crown of the plant.

General Care Comments:

Tolerant of drought, erosion, dry soil, wet soil, black walnut, air pollution

Common Problems

Plant flops in rich or shaded environments, yellows from overwatering, aggressive self seeding

Diseases:

Rusts, smuts, leaf spots

Insects:

Sap sucking insects, foliage chewers, stem borers

Environmental Problems:

Overwatering, poor drainage, flopping

Pests:

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COMGA

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