Introducing the Mammillaria pulmosa, known as feather cactus, which is a fascinating cactus species that belongs to the Mammillaria genus. Native to the desert regions of Mexico, specifically in the states of San Luis Potosi, Queretaro, and Hidalgo, it has gained popularity due to its unique appearance and interesting characteristics.

Mammillaria pulmosa is a clustering cactus that is covered in dense, soft white spines that resemble feathers, giving it a delicate and fluffy appearance. These spines serve as a protective mechanism against predators and help to reduce water loss through evaporation.

When mature, it typically can grow up to 6 inches tall and 16 inches wide. The compact size of its mound of globose stems makes it a popular choice for indoor cultivation, as it can thrive in small pots or containers.

The Feather Cactus is known for its slow growth rate, so it may take several years to reach its full size.

The flowers of Mammillaria pulmosa are typically small and dainty, adding a touch of charm to the already captivating appearance of the cactus.

It produces beautiful creamy white, greenish-yellow, or dull pink with sweet fragrance during the late summer.

To improve flowering in Millillaria cacti, allow them to cool in winter and suspend watering. They have raised tubercles that expand when watered, allowing for increased water storage. The halo effect of flowers emerges from the axils of these tubercles, indicating their unique growth. Avoid prolonged dampness and sitting water, and never let them sit in water. Fertilize once a year in the spring during the growing season for optimal results.

When it comes to Mammillaria pulmosa care, indoors it prefers the southern-facing window, and outdoors in full sun to partial sun-light with well-draining soil.  If kept in a sunny location, Feather cactus will need to be watered once a week. You may need to water it once every two weeks if it is in a semi-shaded area. 

The Feather Cactus can grow outdoors in USDA zones 9 to 11 and is also frost hardy to 20° F. As it prefers warmer indoor temperatures between 65-75 °F, it should not be exposed to freezing temperatures for too long. During the winter months, it's best to reduce watering as the cactus goes into a period of dormancy.

When it comes to propagation, Mammillaria pulmosa can be propagated through offsets or seeds. Offsets, also known as "pups," are small plantlets that grow around the base of the parent plant. These can be carefully separated and replanted to create new individual plants. Alternatively, you can collect ripe seeds from the flowers and sow them in well-draining soil to start new plants.

Overall, the Mammillaria pulmosa, or Feather Cactus, is a delightful addition to any cactus collection. You can never go wrong with the Mammillaria Plumosa Feather Cactus. Caring for this succulent plant is not difficult at all, and they will repay you by being one-of-a-kind cacti. You should definitely try this fresh breathy plant once either to impress your guests or simply to feel good.