Pack Size: 20, 100
Year: 2023
Accepted Scientific Name: Astrophytum myriostigma 'ONZUKA'
Origin and Habitat:
Astrophytum myriostigma 'ONZUKA' is a cultivated variety of Astrophytum myriostigma, originally found in northeastern Mexico, particularly in the states of Coahuila and Nuevo León. It thrives in arid, rocky regions with well-draining soil and high sun exposure. The ‘ONZUKA’ cultivar was selectively bred in Japan for its distinctive, intricate white speckling and symmetrical ribbed form, making it a highly sought-after ornamental cactus.
Description:
Astrophytum myriostigma 'ONZUKA' is a spineless, star-shaped cactus with a compact, columnar growth habit, reaching approximately 4 to 10 inches (10 to 25 cm) in height and 3 to 6 inches (7 to 15 cm) in diameter. Its unique pattern of dense white flecks contrasts beautifully with the green body. The plant produces large, showy, yellow flowers with a silky texture, emerging from the apex in spring and summer.
Cultivation:
Zone: USDA hardiness zones 9-11.
Temperature: Prefers a warm climate with temperatures ranging between 10°C and 35°C. Protect from frost.
Growth Rate: Slow-growing, with a compact, columnar habit.
Soil: Requires well-draining soil with a high pumice content to prevent root rot.
Watering: Water sparingly, allowing the soil to dry completely between waterings. Reduce watering in winter.
Fertilizing: Apply a diluted cactus fertilizer every 2-3 weeks during the active growing season.
Light: Thrives in bright, indirect light or full sun. Avoid excessive shade.
Pests and Diseases: Susceptible to mealybugs and spider mites. Overwatering may lead to fungal infections or root rot.
Germination Info:
Germination is best achieved at a constant temperature of 27°C. Seeds should be surface sown and kept in a humid environment to encourage sprouting.
