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Globe thistle

Globe thistle

Echinops ritro
An architectural clump-forming perennial grown for its striking spherical, metallic steel-blue flowerheads — drumstick "globes" held on tall stems above spiny, deeply cut grey-green leaves that are white-woolly beneath. It blooms in mid to late summer and is one of the very best garden plants for pollinators: at the height of summer the blue globes are smothered in bees and butterflies. Genuinely drought-tolerant, it thrives in poor, dry, sharp-drained soil in full sun, where it earns its place as bold summer structure and stands well into winter as dried seedheads that feed goldfinches and other small birds.
Climate fit: moderate (56/100)
Focal point
Structure
Pollinator
Border
Light
Full sun
Water
Low water
Mature size
24-48" tall · 24" apart
Hardy in zones
3a-9b
brutally cold to frosty winters
Native in Illinois
No

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Insect-pollinated and one of the very best garden plants for pollinators: at the height of summer the steel-blue globes are smothered in bees and butterflies.

Cold hardiness

These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Well-suited
Zone 7a
Plotwright
0°F to 5°F
Well-suited
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
Well-suited today and still thriving in 2050.

Heat tolerance

Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...

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Border
Structure
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Focal point

Sources & citations

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Plotwright. (2026, May 17). Globe thistle (Echinops ritro). Retrieved 2026, June 25, from https://plotwright.com/plants/echinops-ritro
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