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Stemless Thistle
Onopordum acaulon

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

Regional

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

Raleigh, North Carolina

Gardeners' Notes:

No details have been posted.