How much sun does Roman-wormwood need?

Roman-wormwood grows best in full sun conditions.

When does Roman-wormwood bloom?

Roman-wormwood blooms in July, August, and September.

Where is Roman-wormwood native?

Roman-wormwood (Ambrosia artemisiifolia) is native to AL, AR, AZ, CA and 43 more states, per the USDA PLANTS Database and regional native plant society lists.

What pollinators does Roman-wormwood attract?

Roman-wormwood draws bees, beetles, and flies.

Is Roman-wormwood HOA-friendly?

Roman-wormwood takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Roman-wormwood

Name: Pollinator Patch
Author: Pollinator Patch

Ambrosia artemisiifolia

Last reviewed: June 2026

Light

full sun

Water

low

Size

12"–60" H × 6"–24" W

Bloom

Jul, Aug, Sep

Native to

AL, AR, AZ, CA and 43 more states

Pollinators

bees, beetles, flies

Browse plants for this ecoregion

Sierra Nevada Central California Valley Central California Foothills and Coastal Mountains Central Basin and Range Chihuahuan Deserts Central Oklahoma/Texas Plains Edwards Plateau Southern Texas Plains Texas Blackland Prairies East Central Texas Plains Western Gulf Coastal Plain South Central Plains Sonoran Basin and Range

Common ragweed is a weedy annual that produces masses of wind-pollinated flowers from summer through fall. This plant is notorious for causing hay fever and seasonal allergies in many people. It typically grows in disturbed soils and can become quite tall and sprawling by late summer.

In an HOA neighborhood

Roman-wormwood takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.

Works well in: backyard only.

Highly allergenic pollen causes hay fever
Considered a noxious weed in many areas
Looks very weedy and unkempt

Wildlife value

While it does attract some bees, beetles, and flies, ragweed is primarily wind-pollinated and is not considered a valuable pollinator plant. Seeds provide food for birds like goldfinches and sparrows.

Common questions

How much sun does Roman-wormwood need?: Roman-wormwood grows best in full sun conditions.
When does Roman-wormwood bloom?: Roman-wormwood blooms in July, August, and September.
Where is Roman-wormwood native?: Roman-wormwood (Ambrosia artemisiifolia) is native to AL, AR, AZ, CA and 43 more states, per the USDA PLANTS Database and regional native plant society lists.
What pollinators does Roman-wormwood attract?: Roman-wormwood draws bees, beetles, and flies.
Is Roman-wormwood HOA-friendly?: Roman-wormwood takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

Ready to grow Roman-wormwood? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

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