A pure nudum with white dots bearing three distinct ribs is the characteristic feature of the Astrophytum myriostigma tricostatum cactus. The common name of this plant is Bishop’s cap. The cactus belonging to the Cactaceae family is nursery-cultivated. This three-ribbed plant is sometimes marked with white flecks, light or dense in appearance. As the plant gets older, some of them develop more ribs. It flowers only when it is 4 or 5 years old. Between Spring and Autumn, the plant bears funnel-shaped large yellow flowers. The frost-hardy plant has a slow growth rate. It goes dormant during summer. With the full sun to light shade, this cactus grows to a height of 20 cm.

Growth Rate

Astrophytum myriostigma has a slow growth rate.

Flowering

The cactus sprouts funnel-shaped large yellow flowers between spring to autumn. It blooms only when it is 4 to 5 years old.

Watering

One of the Bishop's cap succulent care tip is to water the plant only when the soil is dry. The plant’s water requirements are minimal. During Spring and Summer, water once in 15 days. During Autumn, water the plant once every two months. During winters, watering should be completely stopped.

Soil

Ensure that the soil drains off well. Add pumice to the soil for extra drainage. Also, ensure that the soil is rich in minerals.

Hardiness

The Astrophytum myriostigma tricostatum cactus is slightly frost-hardy. The hardiness zone is 10 -11.

Light

This cactus grows healthily in full sun to light shade.

Propagation

Astrophytum myriostigma tricostatum cactus can be propagated via seed or grafts.

Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz

Bloom Season	Spring to autumn
Botanical Name	Astrophytum myriostigma
Dormancy	Summer
Family	Cactaceae
Flower Color	Yellow
Growth Habit	Cylindrical
Hardiness Zone	44480
Mature Size	20cm
Native Area	Garden origin
Resistance	7°c