Bishop's Cap·test collection

Astrophytum myriostigma

Bishop's Cap

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Species Name

Genus

Family

Adoption Date

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Collection

Gallery

LightBright, direct sunlight for several hours per day. Can tolerate some partial shade but grows best with abundant light.

WateringWater sparingly; allow soil to fully dry between waterings. Reduce watering in winter dormancy.

SoilWell-draining cactus mix with added grit or pumice to prevent root rot.

FertilizerDilute cactus fertilizer during the active growing season (spring-summer), once a month.

HumidityPrefers low humidity; avoid excessive moisture in the air and soil.

TemperatureIdeal between 20–30°C (68–86°F); minimum temperature 5°C (41°F). Protect from frost.

HabitSlow-growing, spineless cactus with ribbed, star-shaped stem.

Mature Size10–20 cm (4–8 inches) tall and wide under cultivation.

Growth RateVery slow-growing.

BloomingYellow flowers appear at the apex in spring or summer, typically on mature plants.

DormancyDormant in winter; withhold water during this period.

MethodsSeed (most common), Occasional offset division (rare)

DifficultyModerate; seeds require patience and careful handling.

Best SeasonSpring to early summer for sowing seeds.

PruningNone required; simply remove any dead or rotting tissue.

RepottingEvery 2–3 years, preferably in spring, to refresh soil and support root growth.

Pests & DiseasesSusceptible to mealybugs and root rot if overwatered.

ToxicityNon-toxic to humans and pets.