Photo by Melody

PlantFiles: Butterweed, Cressleaf Grounsel
Packera glabella

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Packera (PAK-er-uh) (Info)
Species: glabella (gla-BEL-uh) (Info)

Synonym:Senecio glabellus


12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

6-9 in. (15-22 cm)

Not Applicable

Sun Exposure:
Full Sun
Sun to Partial Shade

Parts of plant are poisonous if ingested

Bloom Color:
Bright Yellow

Bloom Time:
Late Winter/Early Spring
Mid Spring
Late Spring/Early Summer


Other details:
May be a noxious weed or invasive
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Self-sows freely; deadhead if you do not want volunteer seedlings next season

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse

Seed Collecting:
Bag seedheads to capture ripening seed
Allow seedheads to dry on plants; remove and collect seeds

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By Jeff_Beck
Thumbnail #1 of Packera glabella by Jeff_Beck

By melody
Thumbnail #2 of Packera glabella by melody

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Thumbnail #3 of Packera glabella by melody

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Thumbnail #4 of Packera glabella by melody

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No positives
1 neutral
1 negative

Gardeners' Notes:

Neutral kperrine On Feb 24, 2011, kperrine from Aiken, SC wrote:

Seen and photographed in the Hitchcock Woods, Aiken, SC

Negative melody On May 5, 2005, melody from Benton, KY (Zone 7a) wrote:

Highly invasive and just about impossible to get rid of.

This plant emerges in late winter here in west KY looking like one of the many wild mustards that are common. It sends up a single stalk form a basal rosette, and the bright yellow flowers emerge in March.

By the first of May, fields and roadsides are completely covered in drifts of yellow blooms.

It prefers plowed fields and waste areas, but takes hold in thickly sodded lawns and yards. It will come up in parking lots and in cracks in the concrete.

Being from the family Asteraceae, the seeds have the little tufted 'parachutes' on the ends and can be carried on the wind great distances.

This plant is identified by the hollow stems and is a cool weather annual. It is poison to livestock in the green plant form, but can be tolerated if eaten as hay.


This plant has been said to grow in the following regions:

Anna, Illinois
Fort Wayne, Indiana
Oakland City, Indiana
Benton, Kentucky
Melbourne, Kentucky
Baton Rouge, Louisiana
Johnston, South Carolina
Buffalo, Texas

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