Eryngium planum 'Blaukappe' ('Blue Cap') - SEA HOLLY 'BLAU KAPPE'

Eye-catching, upright perennial for dry and drained soils. Blue-colored flowers, thistle-like flowers are more intense in full dry sun. 

Blooming Time: summer (about June to July/August)
Size: usually 24-28’ tall x 18" wide
USDA Zones: 4 to 10, heat zones 1-12
Culture: full sun, dry or drained soils of any pH. Plants can rot in waterlogged soil – grows well in sandy, well draining and drier clay, gravelly, shallow rocky soils. Too rich and moist soil (or combination of both) leads to flopping or sprawling
Moisture Needs: dry, medium-dry, medium. Drought and salt tolerant.
Origin: central and south central Europe, Central Asia.
Black walnut tolerant: no
Deer/Rabbit Resistant: yes / yes
Attracts Butterflies or Pollinators: pollinator magnet for various bees and butterflies
Attracts Hummingbirds: no, but attracts small birds
Pot Size: 3.5" x 4" perennial pot
Plant combinations: Flower beds in sun, coastal gardens (exposed to salt), xeriscape, sand or gravel gardens, deer resistant plantings, naturalistic gardens, cut flower gardens. Good with Echinacea (especially with the narrow-leaved species and hybrids), Achillea, Agastache, Amsonia, summer blooming Allium, Asclepias tuberosa, Aster, Baptisia, Calamintha, Coreopsis, Dianthus, Gaura, Knautia, Liatris, Monarda bradburiana, Monarda fistulosa, Nepeta, Oenothera, Penstemons, Platycodon (taller ones), Rudbeckia, Salvia nemorosa hybrids, tall Sedum, Solidago, Stachys, Vernonia lettermannii, Veronica spicata and Veronica incana, Yucca, and grasses like Bouteloa, Muhlenbergia, Sporobolus, Schizachyrium scoparium, Sorghastrum or Panicum.

Picture copyright: Rb-bigorre, Commons Wikimedia