Astrophytum myriostigma ‘Variegata’, also known as the Variegated Bishop’s Cap, is an extraordinary and highly sought-after cactus prized for its sculptural, star-shaped body and beautifully marbled variegation. A member of the Cactaceae family native to the high desert regions of Mexico, this rare variegated form elevates the elegance of the classic Astrophytum myriostigma with bold patches of creamy yellow, lime, and soft green marbling.

The spineless, pentagonal (sometimes 4- or 6-ribbed) body has a smooth, matte surface dusted with signature white trichomes — giving it a frosted, celestial appearance. The variegation forms irregular bands and splashes that look almost painted on, with each specimen entirely unique. As it matures, the cactus maintains its iconic star-like silhouette while its variegation patterns become more pronounced and striking.

Sculptural, refined, and visually stunning, Astrophytum myriostigma ‘Variegata’ is a centrepiece species for any rare cactus collection.

Astrophytum myriostigma ‘Variegata’ – Care Guide

Light

Thrives in bright, indirect to filtered light. Strong light enhances the variegation and keeps the cactus compact. Avoid intense midday sun, especially on the yellow variegated areas, which are more prone to sunburn. A bright windowsill or greenhouse with shade cloth is ideal.

Watering

Water sparingly. Allow the soil to dry out completely between waterings. Overwatering is the most common risk, particularly with variegated specimens, which are more sensitive to excess moisture. In winter, water only once every 4–6 weeks.

Temperature and Humidity

Temperature: Prefers warm conditions between 18–30 °C. Avoid exposure below 10 °C.
Humidity: Low humidity is ideal. Provide good airflow to prevent fungal issues.

Soil and Potting

Use a very free-draining mineral cactus mix — pumice, coarse sand, akadama, grit, and a small amount of cactus compost. Variegated Astrophytums thrive best in lean, airy soil that dries quickly. Repot every 2–3 years in spring into a shallow, wide pot with excellent drainage.

Feeding

Feed lightly every 6–8 weeks in spring and summer with a diluted, low-nitrogen cactus fertiliser. Avoid feeding during winter dormancy.

Pruning and Maintenance

No pruning required. Keep the surface clean by gently brushing away dust. Remove old dried flowers at the top when necessary.

Growth and Maturity

A slow-growing species that stays beautifully compact. Mature Astrophytum myriostigma ‘Variegata’ typically reaches 10–18 cm in height and width, developing stronger colour contrasts and crisp geometric structure over time. It may produce bright yellow flowers in summer — a stunning contrast to its marbled body.

Common Issues

• Soft or sunken tissue: Overwatering or cold damage.

• Scorching: Too much direct midday sunlight on variegated zones.

• Wrinkling: Underwatering — easily corrected.

• Pests: Occasionally mealybugs or spider mites — treat gently with neem oil or isopropyl alcohol.

Background and Benefits

The Astrophytum genus is beloved for its star-shaped geometry and gentle, spineless bodies. The variegated form of myriostigma is especially revered, as variegation in this species is rare and unpredictable, making each plant a true one-of-a-kind specimen.

Symbolically, Astrophytums represent focus, clarity, and resilience — fitting for a plant that thrives in minimal care conditions with such sculptural perfection.

Quick Care Summary

• Light: Bright, indirect or filtered light

• Water: Let soil dry completely; water sparingly

• Temperature: 18–30 °C; avoid below 10 °C

• Humidity: Low; excellent airflow

• Soil: Mineral cactus mix – pumice, sand, akadama, grit

• Feed: Every 6–8 weeks in growing season

• Growth: 10–18 cm; star-shaped, spineless cactus with yellow and green marbled variegation

⚠️ Toxicity note: Non-toxic; safe for pets and humans.

Styling Tip

Display Astrophytum myriostigma ‘Variegata’ in a minimalist ceramic or stone pot to highlight its geometric shape and variegated marbling. A top dressing of white pumice or light gravel enhances its celestial look. Pair with darker-toned cacti like Gymnocalycium ‘Black’ or architectural Euphorbias for a refined, gallery-grade arrangement.