Echinops ritro aka Globe Thistle

Echinops ritro, or small globe thistle, belongs to the daisy family. This perennial grows in clumps on stony slopes and grasslands. Its native range runs from Europe through Turkey to Mongolia. Garden plants reach 3–4 feet [0.91–1.22 metres] tall. Chicago Botanic Garden also records plants as short as 2 feet [0.61 metres]. Clumps spread 2–2.5 feet [0.61–0.76 metres] wide. The plant has an upright form and a medium growth rate.

Stiff, hairy stems have a pale grey to white colour. The leaves grow in turn along each stem. Their upper sides look grey-green, while white hairs cover the undersides. Each leaf has deep lobes, a coarse feel, and spines. Leaves at the base reach 0.5–0.67 feet [0.15–0.20 metres] long. Leaves higher on the stems are shorter. The prickly foliage can make handling the plant awkward.

Round blue flower heads sit at the ends of branched stems. Each stem carries four to ten heads. The heads measure about 0.08–0.17 feet [0.025–0.051 metres] across. Small, star-shaped flowers make up each head. Bloom runs from July through September, sometimes starting in late June. Bees and butterflies visit the flowers, and the plant attracts birds. Round seed heads add interest in fall. The plant can sow its own seed in garden beds.

Full sun gives the best colour and strongest stems. The plant tolerates some shade, but stems may flop. It grows in sand, loam, clay, and shallow rocky soil. Good drainage matters more than rich soil. Poor to average soil suits it, with dry to moderate moisture. Established plants withstand drought. Avoid soggy ground and rich soil, which can weaken growth. Sources place it in USDA zones 3–8. Its taproot makes moving or dividing established clumps hard.

Use it toward the rear of borders or in cottage gardens. Its blue heads contrast with its pale stems and coarse leaves. The flowers suit both fresh bouquets and dried arrangements. Remove spent heads to encourage more blooms and limit seedlings. Deer and rabbits tend to leave it alone. Serious pest and disease problems are uncommon. Watch for aphids, leaf miners, thrips, slugs, and snails. Too much water can lead to root rot. Poor airflow can favour powdery mildew. Plants For A Future lists no known edible uses or hazards. NC State lists it as non-toxic to cats, dogs, and horses. Plants For A Future records traditional medicinal uses for the root.