Sea Holly
Eryngium tripartitum

Family: Apiaceae (ay-pee-AY-see-ee) (Info)
Genus: Eryngium (er-RIN-jee-um) (Info)
Species: tripartitum (try-par-TEE-tum) (Info)

Category:

Alpines and Rock Gardens

Perennials

Foliage Color:

Silver/Gray

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us

Height:

12-18 in. (30-45 cm)

18-24 in. (45-60 cm)

Spacing:

12-15 in. (30-38 cm)

Hardiness:

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

Sun Exposure:

Full Sun

Sun to Partial Shade

Danger:

Plant has spines or sharp edges; use extreme caution when handling

Bloom Color:

Light Blue

Silver/Gray

Bloom Time:

Mid Summer

Late Summer/Early Fall

Foliage:

Herbaceous

Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

By dividing the rootball

From seed; sow indoors before last frost

From seed; direct sow after last frost

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Regional

This plant has been said to grow in the following regions:

Lincoln,

Richmond, California

San Jose, California

Gardeners' Notes:

1
positive
1
neutral
0
negatives
RatingContent
Positive

On Jun 30, 2012, scott415 from San Jose, CA wrote:

I have grown this plant from seed I collected. I'd rate it pretty easy to grow.

Neutral

On Aug 30, 2001, RiseAnn from Rapid City, SD (Zone 5b) wrote:

This plant prefers full sun and moderately fertile, free draining soil. Flowers consist of small round metallic-blue heads surrounded by thin bracts supported by wiry blue stems. Leaves are gray-green.