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

Synonym:Astrophytum myriostigma var. myriostigma

Synonym:Echinocactus myriostigma

Synonym:Astrophytum prismaticum

Category
Cactus and Succulents

Water Requirements
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater

Sun Exposure
Full Sun
Sun to Partial Shade
Light Shade

Foliage

Foliage Color
Bronze

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

Spacing
6-9 in. (15-22 cm)
9-12 in. (22-30 cm)
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)

Hardiness
USDA Zone 9a: to -6.6 °C (20 °F)
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)

Where to Grow
Suitable for growing in containers

Danger
N/A

Bloom Color
Pale Yellow
Bright Yellow

Bloom Characteristics

Bloom Size

Bloom Time
Mid Summer
Late Summer/Early Fall
Mid Fall

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; winter sow in vented containers, coldframe or unheated greenhouse
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting
Collect seedhead/pod when flowers fade; allow to dry
Allow unblemished fruit to ripen; clean and dry seeds
Properly cleaned, seed can be successfully stored