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| Benefits and tolerances: Bold, architectural form; long-blooming flowers that are suitable for cutting or drying; tolerant of full sun, poor soils, heat and drought When to plant: Spring through fall Seasonal interest: Unique blue flowers July through October, peaking in late July to mid-August Distinguishing traits: Stiff white flower stems emerge from a base of large, deeply lobed, spiny leaves that are deep green on the upper surface and white and woolly below. Blue flowers form a round inflorescence that resembles a golf ball covered with blue bugle beads. |
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| Planting notes. Place globe thistle in full sun and plant it in well-drained soil. Porous, sandy loam is ideal, but globe thistle is fairly adaptable. Plants may require staking if they're grown in a rich, moist soil. Deadhead to prevent self-sowing. |
The number one thing I've learned in over 30 years as a landscape professional is this: it's all local! Here in Colorado, I grow globe thistle in a dry, Zone 5 garden with lean, sandy-loam soil — and I've never had any seedlings (and I don't deadhead).
I would love to hear about other growing conditions that make this a great, or not so great plant, in your gardens.
If the link doesn't work, you may want to google it for your information:
http://www.fs.usda.gov/wps/portal/fsinternet/%21ut/p/c5/04_SB8K8xLLM9MSSzPy8xBz9CP0os3gjAwhwtDDw9_AI8zPwhQoY6IeDdGCqCPOBqwDLG-AAjgb6fh75uan6BdnZaY6OiooA1tkqlQ%21%21/dl3/d3/L2dJQSEvUUt3QS9ZQnZ3LzZfMjAwMDAwMDBBODBPSEhWTjJNMDAwMDAwMDA%21/?navtype=BROWSEBYSUBJECT&cid=stelprdb5156738&navid=150130000000000&pnavid=150000000000000&ss=110915&position=Not%2520Yet%2520Determined.Html&ttype=detail&pname=Midewin%2520National%2520Tallgrass%2520Prairie-%2520Nature