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PlantFiles: Leafy Hawkweed, Narrow-leaved Hawkweed, Northern Hawkweed
Hieracium umbellatum

 
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Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Hieracium (hi-er-uh-KEE-um) (Info)
Species: umbellatum (um-bell-AY-tum) (Info)

Synonym:Hieracium scabriusculum

One member has or wants this plant for trade.

Category:
Perennials

Height:
18-24 in. (45-60 cm)

Spacing:
12-15 in. (30-38 cm)

Hardiness:
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)

Sun Exposure:
Full Sun

Danger:
Unknown - Tell us

Bloom Color:
Bright Yellow

Bloom Time:
Late Summer/Early Fall

Foliage:
Herbaceous

Other details:
May be a noxious weed or invasive
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing the rootball
From seed; direct sow outdoors in fall
From seed; direct sow after last frost

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Profile:

No positives
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorComment
Neutral mystic On Sep 1, 2001, mystic from Ewing, KY (Zone 6a) wrote:

This is a soft hairy perrenial that can get about 3 feet tall.Stems and leaves contain milky juice.The alternate, lance-shaped,dark green leaves are up to 4 inches long and 3/4 inch wide.Leaves have a few coarse teeth along the margins.About 40-100 tiny yellow flowers are grouped into heads about 1 inch wide and 1/2 inch tall.The flower heads form in loose terminal clusters atop nearly bare branches.



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