Home / Guides / Plant Files / Asteraceae

Echinops, Globe Thistle 'Platinum Blue'

Echinopsruthenicus

Upload Image Print Article
Echinops ruthenicus by Equilibrium
Upload Image Print Article
Family
Asteraceae (ass-ter-AY-see-ee)
Info
Genus
Echinops (EK-in-ops)
Info
Species
ruthenicus (ru-THEN-ih-kus)
Info
Synonym
Echinops ritro subsp. ruthenicus
Sun Exposure
Sun to Partial Shade
Foliage
Grown for foliage
Height
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)
Spacing
15-18 in. (38-45 cm)
Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
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)
Danger
Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction
Bloom Color
Dark Blue
Bloom Time
Mid Spring
Late Spring/Early Summer
Other Details
Category
Perennials
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color
Bronze
Blue-Green
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

Unknown - Tell us

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; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
From seed; sow indoors before last frost
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Seed Collecting

Unknown - Tell us

Regional

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

Richmond, California

San Francisco, California

Buckfield, Maine

Foxboro, Massachusetts

Saint Paul, Minnesota

Helena, Montana

Murfreesboro, Tennessee

Kalama, Washington

show all
View this plant in a garden
5 members have or want this plant for trade

Featured Videos

Gardener's Notes:

Post Comment
0
positive
2
neutrals
1
negative
Sort By:
Post Comment
Sort By:
B
B
BonFig
Santa Barbara, CA | November 2017 | neutral

Does this plant grow in Southern or Central California? I'm in Santa Barbara and have never seen it growing but would love to try it.

J
J
jerry31557
Patterson, GA | October 2009 | negative

This plant is VERY invasive. Seeds will scatter everywhere if not dead headed and a lot of time even if you do. The seed pods are also V...Read More

B
B
berrygirl
Lakemont, GA (Zone 8a) | March 2007 | neutral

Handsome plants have silvery stems and a mound of foliage. Straight stems with beautiful ball-shaped, mid-blue flower heads. A classic fo...Read More

Popular Plants
SEE ALL
Iris
Peppers
Hydrangeas
Hostas
Contribute to Dave’s Garden
Add a New Plant to the List
Featured
BUG FILES
(Castiarina flavopicta)
BIRD FILES
Bobolink
(Dolichonyx oryzivorus)
Quick Links
View All Families
View All Genera
View All Species
Freeze/Frost Dates
PlantFiles FAQ
Plants with no Photos
Contribute to Dave’s Garden
Add a New Plant to the List
Featured
BUG FILES
(Castiarina flavopicta)
BIRD FILES
Bobolink
(Dolichonyx oryzivorus)