Astrophytum Species, Bishop's Cap, Bishop's Hat, Bishop's Miter Cactus

Astrophytummyriostigma var. nudum

Family
Cactaceae (kak-TAY-see-ee)
Genus
Astrophytum (ass-troh-FY-tum)
Synonym
Astrophytum myriostigma var. nuda
Astrophytum myriostigma f. nuda
Astrophytum nuda
Astrophytum myriostigma subsp. potosinum var. nudum
Sun Exposure
Sun to Partial Shade
Light Shade
Height
under 6 in. (15 cm)
6-12 in. (15-30 cm)
Spacing
9-12 in. (22-30 cm)
12-15 in. (30-38 cm)
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
N/A
Bloom Color
Pale Yellow
Bloom Time
Mid Spring
Late Spring/Early Summer
Mid Summer
Other Details
Category
Cactus and Succulents
Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Can be grown as an annual
Bloom Characteristics
Bloom Size
Other details
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; sow indoors before last frost
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
Regional

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

Tucson, Arizona

Carlsbad, California

El Cajon, California

Granite Hills, California

Harbison Canyon, California

Rancho San Diego, California

San Diego, California

Santee, California

Temecula, California

Grenoble, Rhône-Alpes

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Gardener's Notes:

2
positives
0
neutral
0
negative
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V
V
San Diego, CA | August 2008 | positive

Great Cacti plant all around....Very drought tolerant and can take an extreme hot beating from the sun and can stand cold frosty winters...Read More

P
Acton, CA (Zone 8b) | March 2004 | positive

Normally a grey plant with a very rough almost sandy surface, the nudum variety has just 'normal' green cactus skin... though saw in Hunt...Read More

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