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Virginia Mountain Mint, Wild Basil, Prairie Hyssop
Pycnanthemum virginianum

Family: Lamiaceae (lay-mee-AY-see-ee) (Info)
Genus: Pycnanthemum (pik-NAN-thee-mum) (Info)
Species: virginianum (vir-jin-ee-AN-um) (Info)

Category:

Herbs

Perennials

Height:

24-36 in. (60-90 cm)

Spacing:

18-24 in. (45-60 cm)

Hardiness:

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:

Full Sun

Sun to Partial Shade

Danger:

N/A

Bloom Color:

Violet/Lavender

White/Near White

Bloom Time:

Mid Summer

Late Summer/Early Fall

Foliage:

Herbaceous

Aromatic

Other details:

Flowers are fragrant

Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:

5.1 to 5.5 (strongly acidic)

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

Patent Information:

Non-patented

Propagation Methods:

From herbaceous stem cuttings

From seed; direct sow outdoors in fall

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; stratify if sowing indoors

Seed Collecting:

Bag seedheads to capture ripening seed

Properly cleaned, seed can be successfully stored

Regional

This plant has been said to grow in the following regions:

Ashdown, Arkansas

Hinsdale, Illinois

Minneapolis, Minnesota

Reading, Pennsylvania

Leesburg, Virginia

Gardeners' Notes:

1
positive
2
neutrals
0
negatives
RatingContent
Positive

On Jan 26, 2012, Charmed_Garden from Reading, PA (Zone 6b) wrote:

Prolific performer in 7 gal container. The roots will grow out the drain holes. It can be harvested at least twice. The third growth can be reserved for seed collection. Deadhead if you do not want volunteer seedlings. Will wilt if not watered daily in the heat of summer. No pests or disease problems in zone 6b.

Neutral

On Aug 11, 2009, bigred from Ashdown, AR (Zone 8a) wrote:

Small white flowers are not very showy. Plants are nicely scented when brushed against. Being of the mint family,they are fairly rampant but easy to pull out unwanted runners. Great for butterflies.

Neutral

On Mar 7, 2007, berrygirl from Braselton, GA (Zone 7b) wrote:

Underwood gardens reports that this little-known plant is one of the best nectar plants for butterflies and other beneficial insects.