Synonyms:

None officially recognized for Astrophytum myriostigma cv. Fukuryu.

Habitat:

The Fukuryu cultivar does not have a natural habitat: it is a horticultural selection created and spread in Japan. The base species, Astrophytum myriostigma, on the other hand, is native to the arid, rocky highlands of northeastern and central Mexico, where it grows on calcareous soils poor in organic matter.

Description:

The name Astrophytum derives from the Greek astron (“star”) and phyton (“plant”), referring to the star shape created by the ribs when the plant is viewed from above. Myriostigma means “with a thousand dots”, referring to the white coating that covers the epidermis. As for the epithet Fukuryū (福竜), literally “lucky dragon,” it is a Japanese term, chosen in keeping with the common practice among Japanese collectors of giving poetic names to monstrous or unusual forms. In horticulture, the word is generally understood as a synonym for “additional ribs”, referring to the presence of irregular supplementary ribs that distinguish this cultivar from the classic species.

The Fukuryu form of Astrophytum myriostigma belongs to the genus Astrophytum and to the family Cactaceae. It features a globose stem that, as it grows, tends to become columnar, reaching 8–12 inches (20–30 cm) in height. It generally has five main ribs but is distinguished by the presence of additional ribs and irregular tubercles that break the species’ symmetry. These protuberances give the plant a more complex and dynamic appearance, enhanced by the interplay of light and shadow on the surface. The epidermis is smooth and velvety, spineless, and covered with a whitish coating made up of tiny scales.

Its flowers are large and showy, bright yellow with an orange throat, and bloom at the apex of the plant during the summer. Funnel-shaped and velvety to the touch, they can reach 5-7 cm (2-3 inches) in diameter and usually appear on mature specimens. After flowering, globose, woolly fruits develop, greenish-reddish in color, which split open at maturity to release numerous black, wrinkled seeds used for propagation.

Cultivation:

Growing Astrophytum myriostigma cv. Fukuryu is relatively easy: it is a hardy plant that adapts well to pot cultivation, provided some essential care is taken.

This cultivar prefers a very well-draining substrate, which is essential to prevent waterlogging that could damage the roots. The ideal mix consists mainly of inert materials such as pumice, lava rock, and coarse sand, with a small amount of organic matter added to support plant development.

Watering should be moderate during the growing season, allowing the soil to dry out completely between waterings. With the arrival of autumn, watering should be gradually reduced, and almost completely suspended in winter, when the plant enters dormancy and cannot tolerate excess moisture.

Fukuryu requires plenty of light and benefits from direct sun, which promotes compact growth and encourages flowering. In the hottest months, however, providing light shade during the central hours of the day can help prevent sunburn on the epidermis.

During the growing season, a cactus-specific fertilizer low in nitrogen and rich in phosphorus and potassium can be applied.

Repotting should be done every 2-3 years, preferably in spring, when the plant resumes active growth. Shallow pots proportional to the plant’s size are recommended, ensuring good drainage with a layer of gravel or lava rock at the bottom.

Like all forms of Astrophytum myriostigma, Fukuryu is a non-toxic, spineless plant, making it safe to keep around children and pets.

This plant is generally hardy but can encounter some issues common to cacti. Excess moisture is the main risk factor, as it can cause root and collar rot, which are difficult to treat once they occur.

Among the most frequent pests are mealybugs, which nest between the ribs and at root level, and mites, which cause spots or discoloration on the epidermis. In poorly ventilated environments, sooty mold can also develop.
Prevention relies mainly on using a well-draining substrate, controlled watering, and adequate light exposure. Any infestations can be managed with specific products or targeted natural remedies.

Fukuryu grows slowly and stores water in its tissues, so it’s essential not to rush watering: always wait for the soil to dry out completely before watering again. To reduce the risk of waterlogging and keep the roots healthy, it’s also recommended to grow it in terracotta pots, which allow better aeration than plastic ones.

Propagation:

This plant is propagated almost exclusively by seed, sown in spring on a light, well-draining substrate. Since growth is rather slow, grafting onto vigorous rootstocks is often used.

Curiosity:

One of the most fascinating features of this plant is its extraordinary variability. Being a cultivar obtained through cultivation, there are no corresponding wild forms in nature and no two specimens are ever perfectly identical. Each plant develops ribs, ridges, and tubercles following ever-changing patterns, resulting in unique individuals in terms of arrangement and prominence of protuberances.

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