Eryngium alpinum 'Blue Star' (Alpine Sea Holly)

Eryngium alpinum 'Blue Star,' commonly known as Alpine Sea Holly, is a stunning perennial admired for its spiky, architectural appearance. It features intense steel-blue, thistle-like flowers surrounded by a ruff of spiny, petal-like bracts. The foliage is deeply divided, dark green, and forms a compact clump at the base, complementing the dramatic flower spikes. This plant adds a unique texture and color to borders, rock gardens, or mixed perennial plantings.

Eryngium alpinum 'Blue Star' is drought-tolerant and thrives in sandy or rocky soils, making it an excellent choice for xeriscaping or low-maintenance gardens. Its striking blooms are highly attractive to bees and butterflies and work well in cut or dried flower arrangements. The plant is deer- and rabbit-resistant and pairs beautifully with grasses or other sun-loving perennials like echinacea and rudbeckia. Minimal care is needed, making it a favorite for gardeners looking for a bold, low-maintenance addition to their landscapes.

Sun Requirements

Full Sun. Thrives in bright, sunny locations and requires well-drained soil to perform its best.

Maximum Growth Height

24–36 inches (60–90 cm), adding vertical interest to garden displays.

Bloom Month

July to September. Blooms in mid to late summer, providing a long-lasting and eye-catching display.