Description
Rattlesnake Master (Eryngium yuccifolium), also known as Beargrass and Button Snakeroot, is a bold Midwest native with spiky, yucca-like leaves and unique white, globe-shaped flowers that resemble small thistles. Blooming from July to September, it typically reaches 3–5 feet tall and adds strong texture to prairies and pollinator plantings.
The name “Rattlesnake Master” comes from early European settlers, who believed the plant could treat rattlesnake bites after observing Native Americans using its roots for medicinal purposes. The species name yuccifolium refers to its yucca-like leaves, which give the plant its distinctive look.
It thrives in full sun and does best in medium to well-drained soils but can handle both slightly wet and dry conditions once established. Its deep roots make it drought-tolerant and very resilient in tough sites. It can self-seed, but it’s usually not aggressive and fits well into managed native plantings. Its upright structure and unique texture make it a great contrast plant in prairie gardens.
Rattlesnake Master is highly deer- and rabbit-resistant thanks to its tough, fibrous leaves. While it may not be covered in large butterflies, it’s an excellent pollinator magnet for smaller pollinators like native bees, wasps, flies, and moths, which are often all over the flower heads.
It pairs well with other sun-loving natives like Prairie Blazing Star (Liatris pycnostachya), Purple Coneflower (Echinacea purpurea), Switchgrass (Panicum virgatum), and Indian Grass (Sorghastrum nutans).
