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PlantFiles: Stemless Thistle
Onopordum acaulon

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Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Onopordum (on-OH-por-dum) (Info)
Species: acaulon (a-KAW-lon) (Info)

Category:
Biennials

Height:
under 6 in. (15 cm)
6-12 in. (15-30 cm)

Spacing:
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

Hardiness:
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:
Full Sun
Sun to Partial Shade

Danger:
Plant has spines or sharp edges; use extreme caution when handling

Bloom Color:
Cream/Tan

Bloom Time:
Late Spring/Early Summer

Foliage:
Herbaceous
Silver/Gray

Other details:
May be a noxious weed or invasive
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
Unknown - Tell us

Patent Information:
Non-patented

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

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to view:

By plutodrive
Thumbnail #1 of Onopordum acaulon by plutodrive

By plutodrive
Thumbnail #2 of Onopordum acaulon by plutodrive

No details have been posted.

Regional...

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

Raleigh, North Carolina



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