Globe Thistle Seeds
BLUE GLOW Globe Thistle
Blue Glow globe thistle is a dramatic, 3-4′ tall perennial. Plants produce many, 2″, intense-blue blooms in perfectly-round heads. The gray-green leaves are prickly, and deeply cut. Blue Glow globe thistle flowers over a long July to September season. Blooms attract butterflies, are superb in fresh or dried flower arrangements. Winter hardy to zone 3.
STAR FROST Globe Thistle
When in bloom, Star Frost globe thistle creates a mini-constellation of moonlight-white, spiky spheres. Thistle-like, deep-green leaves are silver-green underneath. Plants are slightly more compact than Blue Glow; Star Frost reaches 40″ tall in flower. Butterflies and bees delight in globe thistle nectar. Blooms first year when started early. Winter hardy to zone 3.
How to 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′ apart. Thin to the strongest plant.
Growing 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.