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.

London Bur-Marigold

Name: Pollinator Patch
Author: Pollinator Patch

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.

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

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