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A picture of a Giant Sea Holly

Giant Sea Holly

Eryngium pandanifolium

Eryngium pandanifolium0 by [1] (CC-BY-SA-3.0)

Full Sun
Easy care
Light watering
Half-hardy

H6-H3

RHS hardiness

-20°C

Minimum temperature

Expected size

Height
Spread

2.5m

Max

1.5m

1.5m

Min

1m

5 years to reach maturity

Flowering

  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

Giant Sea Holly Overview

This clump-forming, evergreen perennial has a rosette of linear to sword-shaped, spiny, silvery green leaves. In late summer into autumn it produces branching stems to 1.5m high bearing cone-shaped umbels of dark purple to maroon flowers.

Common problems with Giant Sea Holly

How to harvest Giant Sea Holly

Generally not harvested.

How to propagate Giant Sea Holly

Division

Seed