Mammillaria geminispina
Common Name: Twin-Spined Cactus

Mammillaria geminispina, also known as the Twin-Spined Cactus, is a stunning and easy-to-grow species that forms dense, rounded clusters covered in a delicate web of white radial spines and short, reddish-brown central spines. The overall effect gives the plant a soft, snowball-like appearance while still maintaining that classic Mammillaria texture and structure.

Native to central Mexico, this species thrives in containers and rock gardens alike, and will eventually form a handsome mound of offsets over time. In spring or early summer, it produces charming rings of pinkish-white flowers around the top of each head—like a floral crown!

☀ Light Requirements
Loves bright, indirect light to filtered sun. Outdoors, provide morning sun and afternoon shade. Indoors, a sunny windowsill or grow light setup works well.

💧 Watering Needs
Water only when the soil is completely dry. Increase slightly during active growth in spring and summer. Reduce to minimal watering during winter dormancy.

🌡 Temperature Tolerance
Hardy to about 25–30°F if kept dry. For colder climates or winter shipping, we recommend adding a [Heat Pack] to your order.

✨ Special Features
• Snowy Appearance – White spines give it a soft, frosty look
• Clumping Habit – Forms a dense mound over time
• Crown of Blooms – Adorned with a halo of pinkish flowers in bloom season

Other Common Names:
Twin-Spined Cactus, Snowball Cactus, Geminispina Mammillaria

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.