Astrophytum myriostigma
bishop's mitre
A cactus forming a spherical or shortly columnar, ribbed grey-green spineless plant to 20cm tall; light yellow flowers 5cm across, sometimes reddish in centre, open in summer
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Size
Ultimate height
0.1–0.5 metresTime to ultimate height
10–20 yearsUltimate spread
0–0.1 metreGrowing conditions
Moisture
Well–drainedpH
Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | ||||
|---|---|---|---|---|
| Summer | Yellow | |||
| Autumn | ||||
| Winter |
Position
- Full sun
Aspect
South–facing or West–facing
Exposure
Sheltered Hardiness
H2Botanical details
- Family
- Cactaceae
- Native to GB / Ireland
- No
- Foliage
- Evergreen
- Habit
- Columnar upright
- Genus
Astrophytum are compact perennial cacti with ribbed, spherical or columnar stems bearing woolly, sometimes also shortly spiny areoles, and large, solitary, funnel-shaped flowers in summer, followed by red or green berries
- Name status
Correct
- Plant range
- NE Mexico
How to grow
Cultivation
Under glass grow in cactus compost with added limestone chippings, in bright filtered light. Lightly water in growing season but keep dry when dormant. In warmer climates outdoors grow in sharply drained, poor, slightly alkaline soil in full sun.
Propagation
Propagate by seed sown at 21°C (70°F) in early spring
Suggested planting locations and garden types
- Patio and container plants
Pruning
No pruning required
Pests
May be susceptible to mealybugs
Diseases
Generally disease-free
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