Gray Narrowleaf Ironweed
Vernonia lettermannii

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Vernonia (ver-NON-ee-uh) (Info)
Species: lettermannii (let-ter-MAH-nee-eye) (Info)

Category:

Perennials

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Water Requirements:

Average Water Needs; Water regularly; do not overwater

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

Where to Grow:

Unknown - Tell us

Height:

24-36 in. (60-90 cm)

Spacing:

12-15 in. (30-38 cm)

15-18 in. (38-45 cm)

18-24 in. (45-60 cm)

Hardiness:

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

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)

Sun Exposure:

Full Sun

Danger:

Unknown - Tell us

Bloom Color:

Purple

Bloom Time:

Late Summer/Early Fall

Mid Fall

Foliage:

Herbaceous

Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

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

Self-sows freely; deadhead if you do not want volunteer seedlings next season

Seed Collecting:

Unknown - Tell us

Regional

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

North Little Rock, Arkansas

High Point, North Carolina

West Chester, Pennsylvania

Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

On Jun 28, 2014, Rickwebb from Downingtown, PA wrote:

This not well-know perennial comes from Oklahoma and Arkansas that is also called Threadleaf Ironweed. Does well in southeast PA and probably does well over much of the East and Midwest in any good quality soil, sort of acid to sort of alkaline. The plant looks good.