ExplorePlants

horseweed

Erigeron canadensis

Horseweed is a tall plant that grows in fields and along roadsides. It has small, fluffy flowers that look like little daisies and can be found in many places during the summer.

Habitat: Grasslands

Appearance

The horseweed is a tall, slender plant with an unbranched stem covered in many narrow, hairy leaves that spiral upwards. Its tiny, whitish-green flowers grow in clusters at the very top, giving it a somewhat scruffy, upright appearance.

KingdomPlantaePhylumTracheophytaClassMagnoliopsidaOrderAsteralesFamilyAsteraceaeGenusErigeron
horseweed
flowering trait badgebiennial trait badgesummer_blooming trait badgedrought_tolerant trait badge
horseweed

Category

Plants

Rarity

Common

Danger

1/5 · Very low

Snaps

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Interesting facts

Farmers don't love it, as it's a very common weed in crop fields!

It’s a super-colonizer, often the very first plant to grow in disturbed ground!

Long ago, Native Americans used horseweed for upset stomachs and other remedies!

Some studies show it can help clean up polluted soil by absorbing metals!

Special abilities

Ability

Wind Traveler

Horseweed has tiny, parachute-like seeds that catch the wind, helping it spread far and wide and colonize new spots quickly.

Ability

Soil Architect

Horseweed can release chemicals into the soil, which helps it compete by making it harder for other plants to grow nearby.

Ability

Tough Survivor

Horseweed has deep roots that help it find water, allowing it to survive and thrive even in dry or disturbed environments.

Measurements & details

Height
30-200 cm
Spread
15-30 cm
Flower Size
0.2-0.5 cm
Bloom Season
Summer to fall
Edible
Yes
Toxicity
None
Lifecycle
Annual
Pollination Method
Wind

Ecological connections

pollinates

Honey bee

Apis mellifera

Visits tiny flowers for nectar and pollen.

eats

Tarnished plant bug

Lygus lineolaris

Feeds on sap and plant tissues.

eats

American Goldfinch

Carduelis tristis

Eats its small seeds in fall and winter.

Traits

Also known as

Marestail

Collections

Safety

Danger

1/5 · Very low

Always look but don't touch wild plants unless a grown-up says it's okay.

Frequently Asked Questions

How tall is horseweed?

30-200 cm

How wide does horseweed spread?

15-30 cm

How big are the flowers on horseweed?

0.2-0.5 cm

When does horseweed bloom?

Summer to fall

Is horseweed edible?

Yes

Is horseweed toxic?

None

What is horseweed's lifecycle?

Annual

How is horseweed pollinated?

Wind

Snap Map

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Where to spot

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