Globe Thistle

(Eryngium planum)

Blue Sea Holly is a striking and unusual herbaceous perennial in the carrot family (Apiaceae). Native to central/southeastern Europe and Central Asia, it is highly prized by gardeners for its metallic-blue, thistle-like flowerheads and architectural, spiky foliage on a clump forming plant. It is native to central and southeastern Europe and central Asia, and found on stony slopes or grasslands. It has a compact habit, grows 3 to 4 feet tall, and 2 to 2.5 feet wide. The blooms appear mid-summer through September, and the gray-green hairy leaves are also attractive. 

For peak color and sturdy plants, plant in full sun at the back of the perennial border, cutting garden, or cottage garden. The blue globe flowers will add interest and contrast to your garden. When used in dried floral arrangements, cut the flowers when young and place them in a warm, dry room to keep the deep blue color. Staking is sometimes required. 

 Growing Conditions:

• Sunlight: Thrives in full sun minimum of 6 hours daily.
• Soil: Prefers dry to medium-moisture, well-drained soils. It tolerates poor, rocky, and sandy soils.
• Transplanting: Due to a deep taproot, plant in its permanent spot initially, as it resents being moved. 

• Fertilizer: Avoid fertilizing; rich soil causes weak, sprawling, or less vibrant plants. 
• Maintenance: Deadhead flowers to prevent excessive self-seeding, though they provide winter interest. 

• Water: Highly drought-tolerant once established
• Size: Grows to approximately 2 to 3 feet tall and 1 to 1.5 feet wide. 

Perennial

Hardiness: Hardy in USDA Zones 5–9

Each pack contains at least 50 seeds.