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PlantFiles: Queen of the Night, Andes Organ Pipe, Hedge Cactus
Cereus hildmannianus subsp. uruguayanus

Family: Cactaceae (kak-TAY-see-ee) (Info)
Genus: Cereus (KER-ee-us) (Info)
Species: hildmannianus subsp. uruguayanus

Synonym:Cereus uruguayanus
Synonym:Piptanthocereus uruguayanus

7 members have or want this plant for trade.

Cactus and Succulents

20-30 ft. (6-9 m)
30-40 ft. (9-12 m)

4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)

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

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

Bloom Color:
White/Near White

Bloom Time:
Mid Spring
Late Spring/Early Summer
Late Summer/Early Fall

Unknown - Tell us

Other details:
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater

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:

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 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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By IslandJim
Thumbnail #1 of Cereus hildmannianus subsp. uruguayanus by IslandJim

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By swtpea1943
Thumbnail #3 of Cereus hildmannianus subsp. uruguayanus by swtpea1943

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By KactusKathi
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There are a total of 71 photos.
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1 positive
1 neutral
No negatives

Gardeners' Notes:

Positive RxBenson On May 25, 2010, RxBenson from Pikesville, MD (Zone 7a) wrote:

My curious cat just knocked over my Cereus and snapped it in half except for the skin on one side. I did my best to keep it connected so it wouldn't dry out while I scouted up first aid materials. I tied it in place using a bamboo plant stake, stabilized it and then decided to use petroleum jelly around the split to try to minimize any oozing and seal the graft. I then generously watered it.

I know that I should have just separated them and dried their raw ends and then restarted the top piece, but I started it from seed a decade ago and was so hoping it might bloom in the next couple years... I am devastated, and....

I am hoarse from screaming at the cat!

Any Cereus doctors out there????? ( I posted my efforts in the image section.)

Neutral Xenomorf On Jun 1, 2007, Xenomorf from Valley of the Sun, AZ (Zone 9b) wrote:

Apparently the synonym "C. peruvianus" was "misapplied" to C. hildmannianus in a 1768 publication. "C. peruvianus" is actually a synonym of C. repandus. Lots of people call C. hildmannianus the Peruvian Apple because the plant looks very close to C. repandus which is the true Peruvian Apple.
Some publications list C. hildmannianus as "Hedge Cactus & Queen of the Night" The main identifying characteristic for C. repandus is it has pinkish white flowers instead of white or white/yellowish flowers; and the flowers are smaller.

The main differences between the two subspecies of Cereus hildmannianus are:
Subspecies 'hildmannianus' ; the stems grow in a more upright fashion and the plant has a more overall compactness look to it. The spines are also less than a quarter inch long.
Subspecies 'uruguayanus' ; Alot of the stems growing out from the base are at slight angles instead of upright and dosen't look as compact. The spines are longer than a quarter inch. The flowers are the same on both subspecies.


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

Chandler, Arizona
Mesa, Arizona
Phoenix, Arizona
Scottsdale, Arizona
Inyokern, California
Menifee, California
San Diego, California
San Leandro, California
Fountain, Florida
Austin, Texas
Portland, Texas
Richmond, Texas

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