Berkheya, Purple Berkheya, African Thistle 'Silver Spike'

Berkheya purpurea

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Berkheya (berk-HE-yuh) (Info)
Species: purpurea (pur-PUR-ee-uh) (Info)
Cultivar: Silver Spike

Category:

Perennials

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Sun Exposure:

Full Sun

Sun to Partial Shade

Foliage:

Unknown - Tell us

Foliage Color:

Bronze

Height:

18-24 in. (45-60 cm)

Spacing:

18-24 in. (45-60 cm)

Hardiness:

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)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Where to Grow:

Unknown - Tell us

Danger:

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

Bloom Color:

Lavender

Bloom Characteristics:

Unknown - Tell us

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Summer/Early Fall

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:

Non-patented

Propagation Methods:

From seed; direct sow after last frost

Seed Collecting:

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

Gardeners' Notes:

No details have been posted.

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