New England Wild Flower Society

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Viola sororia

woolly blue violet, Common blue violet


Woolly blue violet, is a great early bloomer for shade or part shade gardens. Their blue flowers are attractive to humans and insects alike and their regular, clumping form mixes well with both formal and naturalistic plantings. This violet is the host plant for several species of Fritillary (Clossiana spp.).

Click on these links to read in detail:  General Description | Benefits | Ecology | References


Height: 4-6 in
Spread: 4-6 in
Hardiness Zone: 3-7


Bloom Color: Blue

Characteristics & Attributes

Cultivation Status
Species
Exposure
Part Shade
Shade
Soil Moisture
Wet
Average
Ecoregion
(58) Northeastern Highlands
(83) Eastern Great Lakes Lowlands
(59) Northeastern Coastal Zone
(84) Atlantic Coastal Pine Barrens
(82) Acadian Plains and Hills
Ornamental Interest
Spring Bloom
Attracts Wildlife
Host Plant
Attracts Hummingbirds
Pollinator Powerhouse Plant
Other Pollinators/Wildlife
Attracts Butterflies
Attracts Songbirds
Attracts Bees
Tolerance
Urban Environment
Deer/Rabbit Resistant
Additional Attributes
Spring Ephemeral
Low Maintenance
Edible
Landscape Use
Naturalize
Groundcover
Growth Habit
Compact/Clumping
Spreading/Suckering


North American Distribution


General Description

Bloom Description: Blooms from April-May. Flowers are usually blue, but occasionally white.

Growth Habit & Shape: A small clump-forming, short-lived groundcover. It spreads by seed aggressively if it's in the right conditions.

Soil Preferences: Prefers rich, moist soils but is not very picky so long as it doesn't get too wet or too dry.

Root Description: Fibrous.

Garden Uses: Shady rock gardens, slopes, habitat or naturalizing gardens, low maintanence planting, alternative lawns.

Best Management & Maintenance: Viola sororia is short-lived so it needs to seed into spots without too much competition or leaf litter. It loves to seed into gravel or cracks between rocks--so be aware if planting near a patio. If you want more of them or want them to seed further back in a bed, thin some of the leaf litter in spots--though be careful of disturbing desireable insects that may be sheltered nearby.

Common Problems: None.

Benefits

Ornamental Value:

Wildlife Benefits: Flowers attract bees (Lasioglossum, Ceratina, Andrena), including one specialist bee, Andrena violae, skippers, Syrphid flies, and other insects. The caterpillars of several Fritillary butterfly species feed on the foliage, including the stunning Meadow fritillary (Boloria bellona).

Other Practical/Environmental Benefits: Groundcover, soil stablization.

Use in place of: Pansies.

Ecology

Habitat:
Viola sororia can be found in open woodlands, woodland edges, savannahs, roadsides, moist meadows, streamsides, and lawns.


Response to Disturbance: Viola sororia depends on some disturbance to spread. Can handle occasional mowing.

Native State Distributions:
Canada: MB, NF, NS, ON, QC, SK
USA: AL, AR, CO, CT, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, NC, ND, NE, NH, NJ, NY, OH, OK, PA, RI, SC, SD, TN, TX, UT, VA, VT, WI, WV, WY


Wetland indicator status: FAC

Companion Plants:
Chrysogonum virginianum (Green and gold), Phlox stolonifera (Creeping woodland phlox),Solidago flexicaulis (Zig-zag goldenrod), Tiarella cordifolia (Foamflower).

References

  • Holm, H. (2014). Pollinators of Native Plants: Attract, Observe and Identify Pollinators and Beneficial Insects with Native Plants. 198.

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Dan Jaffe (c) Native Plant Trust
Dan Jaffe (c) Native Plant Trust