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PlantFiles: Mammillaria
Mammillaria glassii

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

Synonym:Mammillaria glassii subsp. glassii
Synonym:Bartschella glassii
Synonym:Mammillaria glassii var. glassii

Cactus and Succulents

under 6 in. (15 cm)

6-9 in. (15-22 cm)
9-12 in. (22-30 cm)

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:
Sun to Partial Shade
Light Shade

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

Bloom Color:
Pale Pink

Bloom Time:
Late Winter/Early Spring
Mid Spring

Unknown - Tell us

Other details:
Drought-tolerant; suitable for xeriscaping

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
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

Click thumbnail
to view:

By palmbob
Thumbnail #1 of Mammillaria glassii by palmbob

By palmbob
Thumbnail #2 of Mammillaria glassii by palmbob

By acactus
Thumbnail #3 of Mammillaria glassii by acactus

By palmbob
Thumbnail #4 of Mammillaria glassii by palmbob

By RosinaBloom
Thumbnail #5 of Mammillaria glassii by RosinaBloom


No positives
2 neutrals
No negatives

Gardeners' Notes:

Neutral Xenomorf On Mar 12, 2005, Xenomorf from Valley of the Sun, AZ (Zone 9b) wrote:

Flowers of the subspecies and varieties are:
'subsp. glassii'........Pink, very tiny
'subsp. ascensionis'....Pink 3/4 inches across
'var. nominis-dulcis'...Large pink, 1.2 inches across
'var. siberiensis'......White to pale pink, over an inch across
Stem thickness;
'ssp. glassii'......1.2 inches thick.
'ssp. ascensionis'..up to 4 inches thick.

Neutral palmbob On Mar 27, 2004, palmbob from Acton, CA (Zone 8b) wrote:

Aggressive clumper (offsets) and small plant. ARe two supspecies but I can't tell them apart, so didn't differentiate here. later, once I learn more, maybe i'll separate this into the supspecies.


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

Corona, California
Silverado, California

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