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Johnston's Barrel Cactus

Ferocactus johnstonianus

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Ferocactus johnstonianus by palmbob
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Family
Cactaceae (kak-TAY-see-ee)
Info
Genus
Ferocactus (fer-oh-KAK-tus)
Info
Synonym
Echinocactus johnstonianus
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Herbaceous
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)
Danger
Plant has spines or sharp edges; use extreme caution when handling
Bloom Color
Pale Yellow
Bright Yellow
Bloom Time

Unknown - Tell us

Other Details
Category
Cactus and Succulents
Water Requirements
Drought-tolerant; suitable for xeriscaping
Foliage Color

Unknown - Tell us

Where to Grow
Can be grown as an annual
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 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

This plant is said to grow outdoors in the following regions:

Tucson, Arizona

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Xenomorf
Phoenix, AZ (Zone 9b) | April 2005 | neutral

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

P
P
palmbob
Acton, CA (Zone 8b) | September 2004 | neutral

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

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