Tall Ironweed
Vernonia angustifolia

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Vernonia (ver-NON-ee-uh) (Info)
Species: angustifolia (an-gus-tee-FOH-lee-uh) (Info)

Category:

Perennials

Height:

6-8 ft. (1.8-2.4 m)

Spacing:

12-15 in. (30-38 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)

Sun Exposure:

Sun to Partial Shade

Danger:

Handling plant may cause skin irritation or allergic reaction

Bloom Color:

Magenta (Pink-Purple)

Fuchsia (Red-Purple)

Blue-Violet

Violet/Lavender

Purple

Bloom Time:

Mid Summer

Foliage:

Herbaceous

Velvet/Fuzzy-Textured

Other details:

May be a noxious weed or invasive

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

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

This plant is resistant to deer

Soil pH requirements:

5.1 to 5.5 (strongly acidic)

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Non-patented

Propagation Methods:

From seed; direct sow outdoors in fall

From seed; stratify if sowing indoors

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds

Regional

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

Brooksville, Florida

Inverness, Florida

Mayo, Florida

Saint Petersburg, Florida

Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

On Jul 25, 2010, bdavtab7 from Wimauma, FL wrote:

Found these blooming in Citrus Cty. in the pines. Gorgeous.
It was late July in dry upland wooded area.
The butterflies were gorging themselves.
Plants were growing in red, 'Georgia clay'-type soil.