Photo by Melody

PlantFiles: Sea Holly
Eryngium tripartitum

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

One vendor has this plant for sale.

3 members have or want this plant for trade.

Category:
Alpines and Rock Gardens
Perennials

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
Silver/Gray

Other details:
Average Water Needs; Water regularly; do not overwater

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

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Profile:

1 positive
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive scott415 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 RiseAnn 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.

Regional...

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

Lincoln,
Richmond, California
San Jose, California



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