Mammillaria Spinosissima - Red-Headed Irishman Cactus

Commonly called the Red-Headed Irishman Cactus, this species is native to central Mexico. It is admired for its cylindrical stems densely covered with reddish-brown to white spines, giving it a fuzzy yet striking appearance. Often grown in clusters, it makes a bold sculptural addition to cactus and succulent collections.
FLOWER DETAILS
In spring and summer, it produces rings of small, funnel-shaped flowers ranging from bright pink to magenta. The flowers create a delicate crown around the spiny stem, forming a vibrant halo that contrasts beautifully with its sharp spines.
CARE INSTRUCTIONS
☀️ Light: Requires full sun to bright light; thrives in south-facing windows or under strong grow lights.
💧 Water: Water thoroughly during the growing season, allowing soil to dry completely between waterings; very little water in winter.
🌡️ Humidity: Prefers low humidity; dry air is best.
🪴 Soil: Sandy, gritty cactus mix with excellent drainage.
🏺 Potting: Use shallow pots with drainage holes; avoid repotting often as it prefers being root-bound.
🌱 Growth rate: Slow to moderate; may elongate 1–2 cm per year, forming clusters over time.
🐾 Pet friendly: Yes – non-toxic, though spines can cause injury if touched.
WHY YOU WILL LOVE IT?
Perfect for sunny windowsills, desert-themed gardens, or succulent arrangements.
Its flower crown creates a striking contrast against the spiny body.
Loved at the shop for being resilient, eye-catching, and easy to maintain.
AT ORANGE’S HOME
At Orange’s Home, we cherish Mammillaria spinosissima for its cheerful flower rings that brighten the shop each season. Its tough, spiny body paired with delicate blooms reminds us of the beauty in contrasts.