Eryngium Species, Mexican Thistle, Wright's Eryngo
Eryngiumheterophyllum

Family: Apiaceae (ay-pee-AY-see-ee)
Genus: Eryngium (er-RIN-jee-um)
Species: heterophyllum (het-er-oh-FY-luh)

Synonym:Eryngium altamiranoi

Synonym:Eryngium confusum

Synonym:Eryngium endlichii

Synonym:Eryngium medium

Synonym:Eryngium wrightii

Category
Herbs
Perennials

Water Requirements
Drought-tolerant; suitable for xeriscaping

Sun Exposure
Full Sun

Foliage
Herbaceous

Foliage Color

Height
6-12 in. (15-30 cm)
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)

Spacing
9-12 in. (22-30 cm)
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)

Hardiness
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)

Where to Grow

Danger
Handling plant may cause skin irritation or allergic reaction
Plant has spines or sharp edges; use extreme caution when handling

Bloom Color
Light Blue

Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds

Bloom Size

Bloom Time
Mid Summer
Late Summer/Early Fall
Mid Fall

Other details

Soil pH requirements

Patent Information

Propagation Methods

Seed Collecting
Bag seedheads to capture ripening seed
Allow seedheads to dry on plants; remove and collect seeds