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NC Native Plant Society:
Plant Details

Ambrosia artemisiifolia

Common Ragweed, American Wormwood, Bitterweed, Carrotweed, Blackweed, Hay-fever Weed

Scientific Name:

Ambrosia artemisiifolia

Genus:

Ambrosia

Species Epithet:

artemisiifolia

Common Name:

Common Ragweed, American Wormwood, Bitterweed, Carrotweed, Blackweed, Hay-fever Weed

Plant Type

Herb/Wildflower

Life Cycle

Annual (Herbs Only)

Plant Family

Asteraceae (Aster Family)

Native/Alien:

NC Native

Size:

1-3 ft., 3-6 ft.

Bloom Color(s):

Green

Light:

Sun - 6 or more hours of sun per day, Part Shade - 2 to 6 hours of sun per day

Soil Moisture:

Dry, Moist

Bloom Time:

August, September, October, November

Growing Area:

Mountains, Piedmont, Sandhills, Coastal Plain

Habitat Description:

Roadsides, gardens, disturbed soils, thin soils on rock outcrops. Common throughout NC.

Leaf Arrangement:

Alternate, Opposite

Leaf Retention:

Deciduous

Leaf Type:

Leaves veined, not needle-like or scale-like

Leaf Form:

Simple

Life Cycle:

Annual (Herbs Only)

Wildlife Value:

Has some wildlife value

Landscape Value:

Not Recommended for home landscapes

State Rank:

S5: Secure (*Key)

Global Rank:

G5 - Secure (*Key)

Notes:

Produces large amounts of wind-borne pollen that trigger allergies in many people. Because all parts of the plant are green, many people overlook ragweed and blame the showy goldenrods, which bloom at the same time, for their allergies; goldenrod pollen, however, is primarily insect-borne, and is not the main cause of fall allergies.

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Links:

USDA PLANTS Database Record

NC Extension Gardener Plant Toolbox: https://plants.ces.ncsu.edu/plants/ambrosia-artemisiifolia/

Go Botany: https://gobotany.nativeplanttrust.org/species/ambrosia/artemisiifolia/

Vascular Plants of NC: https://auth1.dpr.ncparks.gov/flora/species_account.php



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