Rattlesnake Master Seeds 100 - Eryngium yuccifolium Native Prairie Perennial

Rattlesnake Master (Eryngium yuccifolium) is a distinctive native prairie perennial known for its bold, architectural texture and unique greenish-white flower heads. The plant forms a rosette of stiff, sword-shaped, yucca-like leaves, and in summer sends up sturdy stems topped with spherical, spiky flower clusters that resemble small thistles or sea urchins. These unusual blooms add striking form and movement to sunny borders, meadow plantings, and pollinator gardens.

This long-lived perennial is a favorite of bees, butterflies, and other beneficial insects, making it an excellent choice for native plant landscapes, rain gardens, and low-water plantings. Its deep taproot helps it tolerate drought once established, and its seed heads persist into winter, providing seasonal interest and food for birds.

Plant Features

• Native prairie perennial with bold, architectural form
• Unique greenish-white spherical flower heads
• Attracts bees, butterflies, and other pollinators
• Drought tolerant once established
• Provides winter interest with persistent seed heads

Growing Information

• Botanical Name: Eryngium yuccifolium
• Plant Type: Herbaceous perennial
• Sunlight: Full sun
• Soil: Well-drained, sandy or loamy soil
• Water Requirements: Low to medium; drought tolerant once established
• Growth Habit: Upright, clump-forming
• USDA Hardiness Zones: 4-9
• Bloom Season: Summer
• Mature Height: 3-5 feet
• Spacing: 18-24 inches

Planting & Care

Sow Rattlesnake Master seeds indoors 8-10 weeks before the last frost or direct sow in fall for natural stratification. Lightly press seeds into the soil surface, as they need light to germinate. Keep the soil consistently moist but not waterlogged. Germination can be slow and irregular, often taking 30-90 days. Once seedlings have several sets of true leaves, transplant them outdoors after the danger of frost has passed, spacing them 18-24 inches apart in a sunny, well-drained location.

Established plants are low-maintenance and drought tolerant. Water regularly during the first growing season to help roots establish, then reduce watering. Deadhead spent flowers to encourage more blooms, or leave seed heads for winter interest and bird food. Divide clumps every few years in early spring if they become overcrowded.

What's Included

100 Rattlesnake Master seeds (Eryngium yuccifolium).