Ferocactus rectispinus 28A

Ferocactus rectispinus, known for its striking long spines and vibrant flowers, is a fascinating species for cactus enthusiasts. Here's a detailed description along with some cultivation tips to help you grow this unique cactus successfully:

Detailed Description

• Stem: Erect, transitioning from globular in young plants to a stout cylinder in older specimens, ranging from 30 to 200 cm in height and 30 to 60 cm in diameter. Initially tubercled, the stem later develops into prominent ribs.
• Ribs: There are 15 to 21 ribs on the plant, which are shallowly notched immediately above each areole.
• Areoles: Oval-shaped with brown wool, spaced 3-4 cm apart.
• Central Spine: Typically, there is one central spine, very long (9 to 25 cm long and 2.5 to 4 mm in cross-section), which is either straight or slightly hooked in younger plants. The spines are robust, rigid, and can be reddish, reddish-grey, or horn-colored.
• Radial Spines: There are 5 to 9 radial spines, spreading outwards, not hooked, and measure 2.5 to 7 cm in length. The upper three are usually larger.
• Flowers: The cactus produces large, light yellow flowers that are 6 to 7.5 cm long and 5 to 7.5 cm in diameter. The blooming season is in the summer.
• Fruits: The fruits are persistent, oblong, and scaled, measuring 2.5 to 5 cm long and 25 to 35 mm in diameter, with bright yellow coloration.

Cultivation Tips

• Light: Ferocactus rectispinus requires full sunlight to partial shade. Direct sunlight promotes healthy growth and spine development.
• Soil: Use a well-draining soil mix, typically one designed for cacti and succulents. Incorporating sand or perlite can improve drainage.
• Watering: Water sparingly, allowing the soil to completely dry out between waterings. Reduce watering in the winter to prevent root rot.
• Temperature: This cactus prefers warm temperatures but can tolerate cooler temperatures down to about 5°C (41°F) during its dormant period in winter. It is not frost-tolerant.
• Fertilization: Feed with a cactus-specific fertilizer during the growing season (spring to summer) to support flowering and growth. Do not over-fertilize.
• Propagation: Propagation is typically done by seeds, as Ferocactus rectispinus does not readily produce offsets. Sow seeds in warm, moist, well-draining soil and provide bright, indirect light.
• Pests/Diseases: Watch out for common pests such as spider mites and scale insects. Overwatering can lead to root rot, so ensure proper soil drainage.

Remember, Ferocactus rectispinus thrives with minimal care, making it an excellent choice for both beginners and experienced cactus collectors. Its unique appearance, especially the long, striking spines and vivid flowers, adds an exotic touch to any collection.

For further reading and specific cultivation advice tailored to your climate, consulting specialized cactus and succulent resources or joining a local enthusiast group can be very beneficial.