Marsh Rattlesnake (Eryngium aquaticum var. ravenelii) is a striking perennial known for its unique spiky globe-shaped flowers, which come in shades of white, purple, or blue. Growing to a height of 3–5 feet with a slender 1-foot spread, it makes a distinctive addition to moist landscapes or naturalistic plantings. Its dramatic floral display provides an eye-catching texture and color contrast.
This adaptable plant thrives in full sun to partial shade and requires very moist soil, though it is best planted in areas that do not experience standing water or flooding. As a rich nectar source, Marsh Rattlesnake plays an essential role in supporting pollinators such as bees and butterflies, making it a valuable choice for wildlife-friendly gardens and wetland restoration projects.
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