Roman-wormwood
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
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.
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.
Does Roman-wormwood fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.