Sea Holly Roots - Blue Star

BOTANICAL NAME

Eryngium alpinum

LIFE CYCLE

• Perennial

LIGHT REQUIREMENT

• Full Sun

BLOOM SEASON

• Summer

GROWTH HABIT

• Branching

PLANT HEIGHT

• 24 to 36 inches

COLOR

• Blue

In drought-prone areas or spots that need a splash of color, the unusual perennial Sea Holly Roots Blue Star is an excellent choice. Its tall, straight, gray-blue stems provide sturdy support for thistle-like, metallic blue flower heads, keeping them upright and highly visible to passing butterflies and bees. Thriving in full sun, the two to three inch blooms emit a striking blue hue that is simply stunning when planted in groups or large masses.

• • Bluish-green spiky foliage
• • Performs best in full sun in fairly dry, poor to moderately fertile well-draind soils
• • At home in rock gardens, cottage gardens, and coastal gardens alike

PLANTING SEASON

• Spring

SOWING METHOD

• Direct Sow

PLANTING DEPTH

• 2 to 3 inches

WATER NEEDS

• Low

PLANT SPACING

• 18 inches

HARDINESS ZONES

• 3
• 4
• 5
• 6
• 7
• 8