Astrophytum Myriostigma Tricostatum
Astrophytum Myriostigma Tricostatum
Astrophytum myriostigma 'Tricostatum' is a rare and highly prized three-ribbed form of the popular Bishop's Cap Cactus. Native to Mexico, this distinctive cultivar is admired for its perfectly symmetrical triangular shape, spineless body, and attractive silvery-white speckling. Its geometric form and slow growth make it a favorite among cactus collectors.
Key Features
- Growth Type: Solitary, spineless cactus
- Stem: Globular when young, becoming short-columnar with age
- Ribs: Typically three prominent ribs, creating a striking triangular profile
- Surface: Covered with fine white trichomes (flecks) that give the cactus a frosted appearance
- Spines: None
- Flowers: Large, silky yellow flowers with a pale center, blooming from spring through summer
- Size: Grows 15–30 cm (6–12 inches) tall and 10–20 cm (4–8 inches) wide
Distinctive Characteristics
- Rare three-ribbed (Tricostatum) growth form
- Elegant architectural symmetry
- Spineless body, making it easy to handle
- Attractive silvery coating that helps protect the plant from intense sunlight
Growing Conditions
Light:
Prefers bright light to full sun. Gradually acclimate plants to strong sunlight to prevent scorching.
Soil:
Requires a very well-draining cactus mix, such as:
- 50% cactus soil
- 25% pumice or perlite
- 25% coarse sand or grit
Watering:
- Water thoroughly during the growing season.
- Allow the soil to dry completely between waterings.
- Keep almost dry during winter dormancy.
Temperature:
- Ideal range: 18–30°C
- Protect from frost and prolonged temperatures below 5°C.
Flowering
Mature plants produce beautiful yellow, daisy-like flowers from the crown during late spring and summer. Flowering is encouraged by:
- Bright sunlight
- Cool, dry winter dormancy
- Proper watering during the active growing season
Care Tips
- Use a clay pot to improve drainage and airflow.
- Avoid overwatering, particularly during winter.
- Feed monthly with a diluted cactus fertilizer during active growth.
- Repot every 2–3 years as needed.
Propagation
- Seeds: The primary method of propagation.
- The Tricostatum form may not always come true from seed, making well-formed specimens especially valuable.
Uses
- Premium collector's cactus
- Architectural container specimen
- Rock and succulent gardens
- Indoor displays with bright light
- Exhibition-quality cactus collections
Care
Packing plants is something we consider carefully and take proper care. Each plant is packed bare root and with proper cushioning to prevent transit damage
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