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Cactaceae
Simpson's Prickly Apple, Simpson's Apple Cactus, Queen-of-the-Night
Harrisiasimpsonii
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Family
Cactaceae
(kak-TAY-see-ee)
Info
Genus
Harrisia
(hair-RIS-ee-uh)
Info
Species
simpsonii
(simp-SON-ee-eye)
Info
Synonym
Cereus gracilis var. simpsonii
Sun Exposure
Full Sun
Sun to Partial Shade
Light Shade
Foliage
Unknown - Tell us
Height
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)
Spacing
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)
Hardiness
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)
Danger
Plant has spines or sharp edges; use extreme caution when handling
Bloom Color
White/Near White
Bloom Time
Blooms all year
Other Details
Category
Cactus and Succulents
Water Requirements
Drought-tolerant; suitable for xeriscaping
Foliage Color
Unknown - Tell us
Where to Grow
Unknown - Tell us
Bloom Characteristics
Unknown - Tell us
Bloom Size
Unknown - Tell us
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 woody stem cuttings
Allow cut surface to callous over before planting
From seed; direct sow after last frost
Seed Collecting
Allow unblemished fruit to ripen; clean and dry seeds
Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds
Regional
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