Eryngium – Sea Holly, Ivory Thistle, Perennials Guide to Planting Flowers

Perennial Flower Information

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Eryngium – Sea Holly, Ivory Thistle

This is a prickly plant in
every feature-the leaves are prickly, the flower heads
are surrounded by spreading, prickly floral bracts and
the flower head itself is like a small Teazle. The beauty
of this plant depends upon the blue-gray effect which
it presents. They grow to a height of 3 feet and bloom
from June to September.

Eryngium amethystinum
has amethyst-colored flowers and grows at least
9. feet tall. E. planum has numerous small flower
heads and shining stems. E. maritimum has whitish
or pale blue flowers and grows 1 foot tall. E. Olberianum
grows 3 feet tall and has large flower heads of
deep blue flowers.

UTILIZE. The Eryngium is
most effective when massed on the lawn, and its uses
as a cut flower are many. It is very decorative for
basket work, or combined in vases with Gladioli. The
branches can be dried, so that the flowers are used
in Winter bouquets. The plants are used in wild gardens
or grouped with the shrubbery.

GENERAL. Eryngiums thrive
best in full sun, in light, sandy loam. They withstand
dry seasons well and when once established should not
be moved often.

PROPAGATION. They are raised
from seeds, but some have found that certain of the
sorts are rather capricious although the plants frequently
self-sow their seeds and spread rapidly. Sow the seed
as soon as ripe, in which case they germinate the next
Spring. The plants are divided with difficulty.

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