London Bur-Marigold
Bidens connata
Last reviewed: June 2026
The USDA PLANTS Database (opens in new tab) does not flag London Bur-Marigold as toxic to livestock.
Light
full sun
Water
high
Size
12"–48" H × 6"–24" W
Bloom
Jul, Aug, Sep, Oct
Native to
CT, DE, GA, IA and 26 more states
Pollinators
bees, butterflies, beetles
Bidens connata is a native wildflower that produces small yellow flowers from summer through fall. This upright plant grows in clumps and thrives in moist to wet soils with full sun exposure. It naturally occurs in wetland edges and marshy areas.
In an HOA neighborhood
London Bur-Marigold 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.
- Strongly weedy appearance
- Can spread aggressively in moist conditions
- Dies back completely as annual
Wildlife value
The long blooming period provides nectar for bees, butterflies, and beetles from midsummer through October. Seeds also provide food for birds and small wildlife.
Common questions
- How much sun does London Bur-Marigold need?
- London Bur-Marigold grows best in full sun conditions.
- When does London Bur-Marigold bloom?
- London Bur-Marigold blooms in July, August, September, and October.
- Where is London Bur-Marigold native?
- London Bur-Marigold (Bidens connata) is native to CT, DE, GA, IA and 26 more states, per the USDA PLANTS Database and regional native plant society lists.
- Is London Bur-Marigold toxic to livestock?
- The USDA PLANTS Database does not flag London Bur-Marigold as toxic to livestock.
- What pollinators does London Bur-Marigold attract?
- London Bur-Marigold draws bees, butterflies, and beetles.
- Is London Bur-Marigold HOA-friendly?
- London Bur-Marigold 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.
Does London Bur-Marigold fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.