Packera Species, Butterweed, Cress-Leaf Grounsel, Yellowtop

Packera glabella

Family
Asteraceae (ass-ter-AY-see-ee)
Genus
Packera (PAK-er-uh)
Species
glabella (gla-BEL-uh)
Synonym
Senecio glabellus
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Herbaceous
Textured
Height
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
Spacing
6-9 in. (15-22 cm)
Hardiness
Not Applicable
Danger
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
Category
Annuals
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
May be a noxious weed or invasive
Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information
Propagation Methods
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Seed Collecting
Bag seedheads to capture ripening seed
Allow seedheads to dry on plants; remove and collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Anna, Illinois

Fort Wayne, Indiana

Oakland City, Indiana

Benton, Kentucky

Melbourne, Kentucky

Baton Rouge, Louisiana

Brunswick, Missouri

Johnston, South Carolina

Buffalo, Texas

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Gardener's Notes:

0
positive
1
neutral
2
negatives
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F
Brunswick, MO | May 2020 | negative

Fields that were flooded by the Missouri River last year and too wet to work last fall and this spring are covered with butterweed. My h...Read More

K
Aiken, SC | February 2011 | neutral

Seen and photographed in the Hitchcock Woods, Aiken, SC

M
M
Benton, KY (Zone 7a) | May 2005 | negative

Highly invasive and just about impossible to get rid of.

This plant emerges in late winter here in west KY looking like on...Read More

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Rotheca Species
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