Photo by Melody

PlantFiles: Boyce-Thompson Hedgehog
Echinocereus boyce-thompsonii

Family: Cactaceae (kak-TAY-see-ee) (Info)
Genus: Echinocereus (ek-in-oh-KER-ee-us) (Info)
Species: boyce-thompsonii

Synonym:Echinocereus fasciculatus var. boyce-thompsonii
Synonym:Echinocereus fasciculatus subsp. boyce-thompsonii
Synonym:Echinocereus fendleri var. boycethomsonii

One member has or wants this plant for trade.

Cactus and Succulents

under 6 in. (15 cm)
6-12 in. (15-30 cm)

18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

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
Light Shade

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

Bloom Color:
Magenta (Pink-Purple)
Fuchsia (Red-Purple)

Bloom Time:
Mid Spring
Late Spring/Early Summer

Unknown - Tell us

Other details:
Drought-tolerant; suitable for xeriscaping
Suitable for growing in containers

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:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
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
Properly cleaned, seed can be successfully stored

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to view:

By Xenomorf
Thumbnail #1 of Echinocereus boyce-thompsonii by Xenomorf

By Xenomorf
Thumbnail #2 of Echinocereus boyce-thompsonii by Xenomorf

By Xenomorf
Thumbnail #3 of Echinocereus boyce-thompsonii by Xenomorf

By Xenomorf
Thumbnail #4 of Echinocereus boyce-thompsonii by Xenomorf


1 positive
1 neutral
No negatives

Gardeners' Notes:

Positive Peterthecactusguy On Apr 28, 2012, Peterthecactusguy from Black Canyon City, AZ wrote:

this species of Echinocereus is quite common around the BCC area. I have two of them. One was a rescue after severe flooding in the Black Canyon City area in 2010. Another was a cutting from a plant that was growing in the way of a path at a friend's house. The cutting survived being rooted twice. First time it was allowed to callous. Next time was when a javelina stepped on the plant and caused both stems to fall over. I cut them cleanly with a knife and allowed them to dry and callous over again. Roots formed after awhile and they went back in ground where one sprouted a bud that was promptly eaten by either a rabbit or a javelina. I need better fencing !

These have brilliant flowers that are a must for any gardener in Arizona. they like partial shade although I have seen them growing in full sun locations.

Neutral Xenomorf On Jan 31, 2006, Xenomorf from Valley of the Sun, AZ (Zone 9b) wrote:

Some comparisons between three Hedgehog species that were at one time considered to be three varieties of Echinocereus fasciculatus.
E. fasciculatus has grayish central spines that are 1-3 inches long.
E. boyce-thompsonii has straw (yellow-tan) colored central spines that are 1-4 inches long.
E. bonkerae has shorter (half inch) central spines that are grayish-white.

I've seen this growing in the wild in Oracle Junction, AZ; Oro Valley, AZ, and on the 'El Camino Del Diablo Trail' (Devils' Highway) that runs between Ajo and Wellton in Arizona through the Cabeza Prieta National Wildlife Refuge.


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

Ajo, Arizona
Black Canyon City, Arizona
Catalina, Arizona
Phoenix, Arizona
Tucson, Arizona

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