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PlantFiles: Johnston's Barrel Cactus
Ferocactus johnstonianus

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Family: Cactaceae (kak-TAY-see-ee) (Info)
Genus: Ferocactus (fer-oh-KAK-tus) (Info)
Species: johnstonianus

Synonym:Echinocactus johnstonianus

One member has or wants this plant for trade.

Category:
Cactus and Succulents

Height:
24-36 in. (60-90 cm)

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)

Sun Exposure:
Full Sun
Sun to Partial Shade

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

Bloom Color:
Pale Yellow
Bright Yellow

Bloom Time:
Unknown - Tell us

Foliage:
Herbaceous
Succulent

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:
Non-patented

Propagation Methods:
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

Click thumbnail
to view:

By palmbob
Thumbnail #1 of Ferocactus johnstonianus by palmbob

By madamecp
Thumbnail #2 of Ferocactus johnstonianus by madamecp

Profile:

No positives
2 neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Neutral Xenomorf On Apr 17, 2005, Xenomorf from Valley of the Sun, AZ (Zone 9b) wrote:

This species might be a population of Ferocactus cylindraceous, but it is also the genetic link between F. cylindraceus and F. wislizeni.

Neutral palmbob On Sep 18, 2004, palmbob from Acton, CA (Zone 8b) wrote:

Densely spined barell cactus from Baja California.. not sure of eventual height, but saw one nearly 3' tall.



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