Photo by Melody

PlantFiles: Mammillaria
Mammillaria albiarmata

Family: Cactaceae (kak-TAY-see-ee) (Info)
Genus: Mammillaria (mam-mil-AR-ee-uh) (Info)
Species: albiarmata

Synonym:Mammillaria albiarmata
Synonym:Mammillaria coahuilensis subsp. albiarmata
Synonym:Mammillaria coahuilensis var. albiarmata

Cactus and Succulents

under 6 in. (15 cm)

3-6 in. (7-15 cm)
6-9 in. (15-22 cm)

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:
Sun to Partial Shade
Light 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

Unknown - Tell us

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

Click thumbnail
to view:

By CactusJordi
Thumbnail #1 of Mammillaria albiarmata by CactusJordi

By CactusJordi
Thumbnail #2 of Mammillaria albiarmata by CactusJordi


No positives
2 neutrals
No negatives

Gardeners' Notes:

Neutral CactusJordi On Aug 14, 2008, CactusJordi from El Cajon, CA wrote:

The biggest difference to Mamm. coahuilensis is that Mamm. albiarmata doesn't have that enormous tuberous root which M. c. has.


Neutral Xenomorf On Mar 3, 2005, Xenomorf from Valley of the Sun, AZ (Zone 9b) wrote:

The differences between the 2 subspecies are:
'coahuilensis' is more prevalent than 'albiarmata' and has white flowers tinged with pink rather than pure white like that of the 'albiarmata' subspecies.
The 'albiarmata' subspecies also has denser spine coverage.

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