Giant Sumpweed (Cyclachaena Xanthiifolia) is a annual herb in the Asteraceae family with easy care difficulty. It requires moderate watering and full sun or partial shade light in USDA hardiness zones 3-9. This plant is toxic to cats and dogs — keep it out of reach of pets.

Cyclachaena xanthiifolia is a North American annual herbaceous plant in the sunflower family, known for its erect stems and coarse foliage.

Giant Sumpweed

Giant Sumpweed

Cyclachaena Xanthiifolia

Cyclachaena xanthiifolia is a North American annual herbaceous plant in the sunflower family, known for its erect stems and coarse foliage.

Quick Facts

Type
herb
Lifecycle
annual
Care Difficulty
Easy
Water Needs
Moderate
Light
Full Sun, Partial Shade
Hardiness Zones
3-9

Safety

⚠️
Not Pet Safe
👶
Child Safe
☠️
Toxic

Growing Conditions

Soil Types:loamy, sandy, gravelly
Indoor:No
Outdoor:Yes
Garden Use:groundcover, pollinator support, erosion control

Care Calendar

Monthly care tasks for Giant Sumpweed

Jan
Prune
Feb
Fertilize
Mar
Repot
Apr
Water+
May
...
Jun
...
Jul
...
Aug
...
Sep
...
Oct
...
Nov
...
Dec
...

Expert Care Tips

Pro tips from botanists and plant experts

Watering Tip

Check soil moisture by inserting your finger 1 inch deep. Water only when the top layer feels dry to prevent overwatering.

Humidity Trick

Group plants together to create...

Growth Hack

Rotate your plant every...

Photo Gallery10+ photos

Giant Sumpweed
Giant Sumpweed detail

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Taxonomy

Family:Asteraceae
Genus:Cyclachaena