'Blue Cap' ('Blaukappe') Sea Holly blooms in July and August, producing silvery blue spiky flowers in abundance. The unusual cone-shaped blooms are held on thistle-like silvery foliage and are attractive to butterflies and other pollinators. Eryngium 'Blue Cap' performs well in hot dry areas and is salt tolerant, so seashore locations are a perfect place for this unusual perennial.
USDA Hardiness Zone
Eryngium planum Blue Cap (Blaukappe) #1 (steel-blue)