The feathery spination on this plant is remarkable. Not at all stiff or threatening, it shields the green body totally. Over many years this mammillaria can grow into a sizeable specimen. Iit is a good idea to use a fairly coarse topping to keep the white feathers away from your soil mix to avoid discoloring. They are not a problem to culture if you check the soil to be sure it is nearly dry before watering. They will last for years if you keep them from sitting around wet.
Size: 6 inch pot size