Blue Glow globe thistle is a dramatic 3-4 ft. tall perennial. Plants produce many 2 in. wide, intense-blue flowers in perfectly-round heads. The gray-green leaves are prickly and deeply cut. Blue Glow globe thistle blooms over a long July to September season. Flowers attract butterflies, are superb in fresh or dried flower arrangements. Winter hardy to zone 3.
Growing Blue Glow Globe Thistle Seeds
Plant Globe Thistle Seeds: Sow globe thistle seed in cell packs or flats, press into soil, do not cover. Light aids germination. Kept at 65-70° F., germination is in 14-21 days. Can direct sow globe thistle into prepared seed beds in groups of 4 seeds, spaced 2 ft. apart. Thin to the strongest plant.
Grow Globe Thistle: Full sun. Plants thrive in poor, alkaline soil, adapt well to average soil. Drought tolerant once established, more flowers with moderate water. Globe thistle is fast growing, long-lived (10 years or more), and not invasive. Plants are deer and rabbit resistant. Flowers attract bees, birds, and butterflies.
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We guarantee all the seeds we sell for one full year from the date of purchase. If you are unsatisfied with any seeds purchased from Swallowtail Garden Seeds, we will issue a refund. For customers in the U.S., we can send one-time replacement packets or issue a refund.