Mammillaria spinosissima ‘Un Pico’
Common Name: One Spine Cactus

Mammillaria spinosissima ‘Un Pico’, also known as the One Spine Cactus, is a rare and captivating cultivar of the beloved Spiny Pincushion Cactus. What sets this variety apart is its unique areole structure—each areole features just one prominent central spine, giving it a tidy, balanced appearance that’s both minimalist and eye-catching.

The cylindrical body is typically deep green, densely covered with white radial hairs and that one signature spine, often golden or reddish in color. In spring or early summer, it puts on a beautiful floral display with bright pink to magenta flowers forming a ring near the top of the plant.

☀ Light Requirements
Enjoys bright, direct sunlight or filtered light. Outdoors, full morning sun is ideal. Indoors, place near a south- or west-facing window to maintain its shape and encourage blooming.

💧 Watering Needs
Water deeply only when the soil is completely dry. Use a well-draining cactus mix. Reduce watering significantly during winter dormancy.

🌡 Temperature Tolerance
Hardy to about 25–30°F in dry conditions. Protect from hard frost and wet cold. Add a [Heat Pack] to winter shipments.

✨ Special Features
• One-Spine Areoles – Distinct and clean appearance with minimal spination
• Reliable Bloomer – Produces a halo of vibrant flowers
• Compact Columnar Growth – Great for pots, shelves, or centerpiece clusters

Other Common Names:
Un Pico Cactus, One Spine Mammillaria, Minimalist Pincushion

This cactus will ship bare root and will be ready to place directly in a well draining soil mix like our Custom Cactus Mix.

Photos in the listings unless otherwise specified are representative of the plant that will be sent to you.
However, Plants grow differently and each plant may vary slightly in shape, size, growth pattern, etc.
Of course, if you receive a plant that you are dissatisfied with please reach out to us. We want to make it right!

If temperatures near you are below 45℉ we highly recommend adding a Heat Pack to your order.
If temperatures where you live will be much lower than 20℉ even heat packs may not work. You may consider waiting until things warm up a bit. We know you love your plants just like we do and we wouldn't want any of them to freeze.