Photo of Eryngium alternatum foliage by Stan Shebs

Photo by Stan Shebs

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Eryngium alternatum

Plant type

perennial

size

  • H: 5'
  • W: 3'

planting zones

  • 7a-10b

Eryngium alternatum plant details

Eryngium alternatum is a broadleaf evergreen perennial with green foliage. In summer blue and silver flowers emerge. Grows well with sun - mostly shade and even moisture - regular water. Does well in rich and well-drained soil.

CHARACTERISTICS OF Eryngium alternatum

Plant type: perennial
Plant family: apiaceae
Foliage: evergreen green
Mature size: 3 FT wide, 5 FT tall
Flowers: blue and silver blooms in summer
Uses: spiky

GROWING CONDITIONS for Eryngium alternatum

USDA Zones: 7a - 10b
Sun exposure: sun - mostly shade
Watering frequency: even moisture - regular
Soil needs: rich and well-drained

Nursery contributed plant descriptions

So super huge, this Eryngium's common name should be "Ginormous Sea Holly". Growing to an impressive 5' tall & 3' wide, it's a showstopper. Bees adore its 2" long domes of purple flowery goodness, which also makes extraordinary fresh or dried cut flowers. Native to Mexico's high mountain tropics, E. alternatum loves coastal California's cool & foggy climate. Standout spiky & striped foliage makes this an awesome drought tolerant attention grabbing focal point plant. Thrives in poor, dry, well-drained soil. If you're reading this sign in the nursery, it's your lucky day! We're only able to offer small quantities of this mega-rare rock star.

Gardening facts about Eryngium alternatum plant

How to Grow Eryngium alternatum

  • Sun Exposure

    • sun - mostly shade
  • Water Needs

    • even moisture - regular
  • Soil Needs

    • well-drained
    • rich

Features

  • Foliage Color

    • green
  • Flower Color

    • blue
    • silver
  • Flower Season

    • summer
  • Foliage Season

    • evergreen

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