Eryngium aquaticum

Marsh Rattlesnake-master, Sea Holly

The Marsh Rattlesnake-master is an attractive silver blue flowering perennial that is widely underused. Eryngium aquaticum stands 3-4’ tall and blooms in mid to late summer. Marsh Rattlesnake-master’s silver green foliage in combo with its silvery blue flower is a wonderful companion plant with Lobelia siphilitica and Pannicum virgatum. Tolerates fun sun to partial shade.

Bloom Color

Silver

Characteristics & Attributes

Exposure

•	Sun
•	Partial Shade

Mature Height

•

2' - 4'

Spread Characteristics

•	Clumping
•	Prolific Seeder

Season of Interest (Flowering)

•	Summer
•	Fall

Season of Interest (Foliage)

•	Spring
•	Summer
•	Fall

Pond Zonation

•	Flood Plain - Upland
•	High Marsh - Saturated Soil

Foliage Color

•	Blue
•	Green
•	Silver

Wildlife Benefits

•	Cover
•	Food
•	Nesting
•	Songbirds
•	Waterfowl

Critter Resistance

•	Deer Resistant

Wetland Indicator Status

•

OBL

Plant Type

•	Bog/Marsh
•	Flowering Perennial
•	Marginal

Attributes

•	Cut Flower
•	Dried Flower
•	Drought Tolerant
•	Erosion Control
•	Fibrous Roots
•	Great Foliage
•	Native
•	Naturalizing
•	Ornamental Flower
•	Rain Garden
•	Specimen
•	Storm Water Basin

USDA Hardiness Zone

•	6
•	7
•	8