Marsh Rattlesnake-master
Eryngium aquaticum

Marsh rattlesnake-master is a wetland eryngo of the Southeast, topped with steely blue, thistle-like flower heads that swarm with bees and wasps. Architectural structure for rain gardens and pond edges.
- Family
- Apiaceae
- Type
- wildflower
- Lifespan
- biennial
- Height
- 3–4 ft
- Spacing
- 1–3 ft apart
- Light
- part shade
- Soil moisture
- wet
- Soil pH
- acidic
- Bloom
- June, July, August, September, October
- Bloom colors
- green
- Wildlife value
- pollinators, butterflies
- Landscape uses
- border, rain garden
- Native states
- AL, DC, DE, FL, GA, MD, MS, NC, NJ, NY, PA, SC, VA