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PlantFiles: Opuntia
Opuntia polyacantha f. ursina

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Family: Cactaceae (kak-TAY-see-ee) (Info)
Genus: Opuntia (op-UN-shee-a) (Info)
Species: polyacantha f. ursina

Synonym:Opuntia polyacantha var. erinacea f. ursina
Synonym:Opuntia polyacantha var. ursina
Synonym:Opuntia erinacea var. ursina

Category:
Cactus and Succulents

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

Spacing:
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

Hardiness:
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)

Sun Exposure:
Full Sun
Sun to Partial Shade

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

Bloom Color:
Bright Yellow

Bloom Time:
Mid Spring
Late Spring/Early Summer

Foliage:
Grown for foliage
Succulent

Other details:
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping

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 woody stem cuttings
From softwood cuttings
Allow cut surface to callous over before planting
From seed; direct sow after last frost

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds
Allow unblemished fruit to ripen; clean and dry seeds
Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds
Properly cleaned, seed can be successfully stored

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Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive Xenomorf On Jul 23, 2010, Xenomorf from Valley of the Sun, AZ (Zone 9b) wrote:

Not to be confused with Opuntia polyacantha var. nicholii which also have 6-7+ inch bristoly spines. The difference is that this form "ursina", the spines are bleach white and "var. nicholii" is not.



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