Photo by Melody

PlantFiles: Sheldon's Pincushion
Mammillaria sheldonii

Family: Cactaceae (kak-TAY-see-ee) (Info)
Genus: Mammillaria (mam-mil-AR-ee-uh) (Info)
Species: sheldonii (shel-DON-ee-eye) (Info)

Synonym:Mammillaria swinglei
Synonym:Mammillaria gueldemanniana
Synonym:Mammillaria alamensis
Synonym:Mammillaria guirocobensis
Synonym:Mammillaria inaiae

Cactus and Succulents

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

6-9 in. (15-22 cm)
9-12 in. (22-30 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:
Full Sun
Sun to Partial Shade
Light Shade

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

Bloom Color:
Magenta (Pink-Purple)
White/Near White

Bloom Time:
Mid Spring

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 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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No positives
1 neutral
No negatives

Gardeners' Notes:

Neutral Xenomorf On Apr 10, 2005, Xenomorf from Valley of the Sun, AZ (Zone 9b) wrote:

Other valid synonyms are:
Mammillaria pseudoalamensis
Mammillaria marnierana
Mammillaria milleri var. swinglei
Mammillaria gueldemanniana var. guirocobensis
Ebnerella guirocobensis
Ebnerella swinglei
Ebnerella sheldonii
Ebnerella inaiae
Neomammillaria swinglei
Neomammillaria sheldonii
Chilita gueldemanniana
Chilita sheldoni
Chilita sheldonii
Chilita swinglei
Chilita alamensis
Chilita inaiae


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

Chandler, Arizona
Tucson, Arizona

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