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Downy Wood Mint

Blephilia ciliata (bleh-FIL-ee-uh sil-ee-ATE-uh)

Family: Lamiaceae Native Herbaceous (1-3 ft)

Ohio Horsemint is a short-lived, but fast growing, herbaceous perennial wildflower native to the central and eastern parts of the United States, although not commonly found in North Carolina. It is typically found growing wild in thin soils over limestone in dry open woods, prairies, savannas, limestone bluffs, glades, barrens, clearings, fields, steep slopes, disturbed sites and roadsides.. The genus name comes from the Greek blepharis meaning an eyelash, which refers to the bracts being fringed by hairs. Plant it in the full sun to partial shade in well drained loamy or silty, moist to dry soil with a PH of 6 to 8. The soil can contain significant amounts of loam, clay, or gravel. The plant has some drought tolerance, but does not tolerate waterlogged soils or flooding, salt, or soil compaction. The plant forms clumps with limited spread and the roots are fibrous and shallow. The stems give off a mild fragrance when crushed. The leaves of this wildflower in the mint family can be used in drinks and sauces and the fragrant blue-purple flowers are in blossom from late spring to mid-summer. This plant was selected as the 2022 NC Wildflower of the Year , a program managed by the North Carolina Botanical Garden with some financial support from the Garden Club of North Carolina. Use this plant in naturalized areas and open woodland gardens. Diseases, Insect Pests, and Other Plant Problems: Susceptible to powdery mildew. Watch for aphids, spider mites, thrips, whiteflies, and leafminers.

Source: NC State Extension Gardener Plant Toolbox ↗ NC State Extension Gardener Plant Toolbox, 54 attributes.

How it fits the guild

Guild layer 4 - Herbaceous (1-3 ft) Optimal soil pH Acid (<6.0); Neutral (6.0-8.0)
See companions & conflicts ↓

Companions & Conflicts

Curated pairwise relationships between this plant and others in the library — who feeds whom, who competes, who confuses the pests. Green reads as a good pairing, red as one to avoid.

No curated interactions recorded for this species yet.

Also noted by NC State

Related species the NC State Plant Toolbox flags for this plant — look-alikes to tell apart, and plants that play a similar role in a planting. Ones we carry in the library are linked.

Full plant profile

Growing Conditions
Plant type
Herbaceous Perennial; Native Plant; Wildflower
Life cycle
Perennial
USDA zones
4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b, 8a, 8b
Light
Full sun (6 or more hours of direct sunlight a day) | Partial Shade (Direct sunlight only part of the day, 2-6 hours)
Soil texture
Clay; Loam (Silt); Sand
Soil pH
Acid (<6.0); Neutral (6.0-8.0)
Soil drainage
Good Drainage | Moist | Occasionally Dry
Available space
12 inches-3 feet
NC region
Mountains; Piedmont
Mature size
Height: 1 ft. 0 in. - 2 ft. 6 in. | Width: 0 ft. 8 in. - 1 ft. 6 in.
Growth rate
Rapid
Maintenance
Medium
Canopy layer
4 - Herbaceous (1-3 ft)
Form & Appearance
Habit / form
Clumping; Erect
Leaf color
Green
Leaf type
Simple
Leaf arrangement
Opposite
Leaf shape
Lanceolate; Oblong
Leaf margin
Entire
Leaf size
1-3 inches long, 1-3 inches wide
Hairs present
Yes
Leaf detail
The leaves are up to 3½ inches long and 1½ inches across, broadly oblong to lanceolate in shape, and have smooth, slightly ciliate margins. The lower leaves have short stout petioles, while the upper leaves are sessile. They have deep pinnate venation and are covered with a white pubescence.
Flower color
Blue; Purple/Lavender; White
Flower value
Fragrant; Showy
Flower form
Spike
Flower shape
Lipped; Saucer
Flower size
< 1 inch
Flower detail
The upper half of the central stem is perforated by whorled clusters of flowers. Each cluster of flowers is about 2 to 3 inches across with the flowers arranged in circular rows. The flowers are white, light pink, or lavender, and individually slightly less than ½ inch long. There are two prominent lips with small purple spots on the lower lip. The blooming period lasts about a month.
Bloom time
Spring; Summer
Fruit detail
The fruit is dry but does not split open when ripe.
Stem detail
Unbranched. Side stems develop from upper leaf axils if the central stem is damaged. The stout central stem is 4-angled and covered with short white hairs.
Wildlife & Ecology
Native status
Native
Origin
Central and eastern North America.
Distribution
Canada, south to Georgia and west to Oklahoma.
Wildlife value
The flowers attract long-tongued and short-tongued bees, bee flies, Syrphid flies, butterflies, and skippers.
Attracts
Bees; Pollinators
Food & Medicine
Edible parts
Leaves

Edibility

Minty leaves can be eaten raw and used in teas. The leaves can be used to prepare sauces and drinks.

Landscape Use
Landscape location
Meadow; Woodland
Landscape theme
Drought Tolerant Garden; Native Garden; Pollinator Garden
Design feature
Mass Planting
Garden tags
#native perennial #NC native #blue flowers #flowers mid-summer #purple flowers #flowers late spring #flowers early summer #perennial flowers #groundcover #pollinator plant #NC Native Pollinator Plant #wildflower #NC Wildflower of the Year
Problems & Resistance
Resistant to
Deer; Drought; Dry Soil
Propagation
Division

Planted at Hunnicutt

Nobody’s planted this one yet.