Alpine Eryngo, Alpine Sea Holly
Eryngium alpinum 'Superbum'

Family: Apiaceae (ay-pee-AY-see-ee) (Info)
Genus: Eryngium (er-RIN-jee-um) (Info)
Species: alpinum (AL-pin-um) (Info)
Cultivar: Superbum

Category:

Perennials

Height:

24-36 in. (60-90 cm)

Spacing:

15-18 in. (38-45 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

Danger:

Unknown - Tell us

Bloom Color:

Medium Blue

Bloom Time:

Mid Summer

Late Summer/Early Fall

Foliage:

Silver/Gray

Blue-Green

Other details:

Average Water Needs; Water regularly; do not overwater

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

7.9 to 8.5 (alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

Unknown - Tell us

Seed Collecting:

Unknown - Tell us

Regional

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

Monterey, California

Hampton, Virginia

Gardeners' Notes:

0
positives
1
neutral
0
negatives
RatingContent
Neutral

On Jan 24, 2005, lmelling from Ithaca, NY (Zone 5b) wrote:

Is said to be more vigorous than the species.