Rattlesnake Master (Eryngium yuccifolium)

Rattlesnake Master

Eryngium yuccifolium

Rattlesnake Master is a distinctive prairie perennial that grows 2 to 5 feet tall, featuring spiky, yucca-like leaves and globe-shaped white flower heads. It is commonly found in dry prairies and open woods, thriving in sandy or loamy soils. A strong attractor of pollinators, including bees and butterflies, it also provides seeds for birds in late summer. Historically, Indigenous peoples used its fibrous leaves for weaving and cordage. Its unique form and drought tolerance make it an excellent choice for prairie plantings, xeriscaping, and pollinator-friendly gardens.

Characteristics

Product Form	Plant, Seed
Type	Forb
Sun	Full Sun, Partial Sun
Soil	Clay, Loam, Sand/Gravel, Peat, Calcareous
Moisture	Dry, Mesic
Average Max Height (inches)	70
Suggested Plant Spacing (inches)	30
Bloom month(s)	July, August
Bloom Color or Type	White, Green
Dominance	Medium

Range Maps

Sowing Information

Sow seed onto a firm, weed-free seedbed. Hand-broadcast seed making two perpendicular passes for even coverage. If planting a mix, broadcast the grass component first and lightly rake/drag it into the top 1/8–1/4" of soil. Next, broadcast wildflower/forb seed and press it into the soil surface (with a roller/cultipacker or the back of a rake) to ensure good seed-to-soil contact. After seeding, apply a very light layer of clean, seed-free straw (or other weed-free, site-appropriate mulch) to reduce erosion and retain moisture without smothering seedlings. A good rainfall or thorough watering will help settle seed and mulch and improve germination.

Planting Information

Dig a hole in your planting site slightly larger than the plant’s root system. When placing the plant into the hole, ensure that the soil line remains consistent with its original level in the pot. Fill in around the roots with the excavated soil, gently firming it to eliminate air pockets. Water the plant thoroughly the same day to promote successful establishment.