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Cirsium Species, Gray Pasture Thistle, Wavyleaf Thistle

Cirsiumundulatum

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Cirsium undulatum by kennedyh
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Family
Asteraceae (ass-ter-AY-see-ee)
Info
Genus
Cirsium (SIR-see-um)
Info
Species
undulatum (un-dew-LAY-tum)
Info
Synonym
Cirsium megacephalum
Sun Exposure
Full Sun
Foliage
Herbaceous
Height
24-36 in. (60-90 cm)
Spacing
18-24 in. (45-60 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)
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)
Danger
Plant has spines or sharp edges; use extreme caution when handling
Bloom Color
Magenta (pink-purple)
Bloom Time
Late Summer/Early Fall
Mid Fall
Other Details
Category
Biennials
Perennials
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color

Unknown - Tell us

Where to Grow

Unknown - Tell us

Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size

Unknown - Tell us

Other details
May be a noxious weed or invasive
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
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
From seed; sow indoors before last frost
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored
Regional

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

Concho, Arizona

Beatrice, Nebraska

Arlington, Texas

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Gardener's Notes:

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1
positive
2
neutrals
0
negative
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K
K
KSBaptisia
Beatrice, NE (Zone 5b) | July 2008 | positive

A very beautiful native thistle.

X
X
Xenomorf
Phoenix, AZ (Zone 9b) | July 2007 | neutral

Seen growing along the side of the road between Concho & Showlow, Arizona. Apache County, Highway 61, June 30th, mid Summer, zone 6b, ele...Read More

F
F
frostweed
Josephine, Arlington, TX (Zone 8a) | May 2007 | neutral

Wavyleaf Thistle, Wavy-Leafed Thistle Cirsium undulatum is native to Texas and other Satates.

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