Mammillaria Plumosa “Feather Cactus” Care & Buying Guide

Mammillaria Plumosa


Light requirementsHigh
Water requirementsLow
Ease of careEasy
Temperature resistanceMildly frost-hardy
Growth speedMedium
Indoor growingSuitable


Taking Care Of Mammillaria Plumosa “Feather Cactus”

Ideal conditions

Like many succulents, Mammillaria Plumosa “Feather Cactus” is best to keep outdoors because it needs partial to full sun. Belonging to the USDA hardiness zone 9a (20 to 25 degrees F/ -6.7 to -3.9 degrees C), the Feather Cactus is also fairly frost-hardy, but it prefers warmer temperatures and shouldn’t be exposed to cold winter temperatures for too long.


Mammillaria Plumosa “Feather Cactus” is drought-resistant and requires little water to thrive. You should only water this cactus when its soil is dry to the touch. Too much water is very likely to cause root rot in this cactus.

Just like other typical succulents, the Feather Cactus should be provided with little to no water in winter. This is because the cactus is dormant in winter and requires much less water than in summer. You may mist the cactus occasionally if you feel like it, but be very careful since root rot is very easy to trigger in winter.

Where to plant

Plant Mammillaria Plumosa “Feather Cactus” in a fast-draining cactus mix. This is to prevent standing water at root level. For extra draining, you may add perlite or pumice in a 1:1 ratio with the cactus mix.

No matter whether you’ll be keeping this cactus indoors or outdoors, we suggest that you plant it in a pot – this will make the cactus very easy to move around. It’s easy to find a pot for such a small cactus as the Feather Cactus, but make sure that the pot has drainage holes at the base.

Given that the Feather Cactus requires partial to full sun, it should be kept outdoors where direct sunlight is plentiful. But even though this cactus requires direct sunlight, it should be placed in a shaded location on very hot days or during heatwaves to prevent sunburn.

You may also keep the Feather Cactus indoors, but only if you have a location that’s brightly lit all day. Otherwise, the plant won’t be able to grow successfully.

If winters are cold in your area, then make sure to move the cactus inside to protect it from freezing temperatures. 

General care information

Fertilize the Feather Cactus during summer and winter with a cactus fertilizer mix. Depending on the mix used, you should dilute it to 1/4-1/2 strength and fertilize the soil once every 4-8 weeks.

Aside from fertilization, you will occasionally need to repot this cactus. Given that this cactus only grows up to 3 inches tall, you won’t have to do this often. But you might want to repot the Feather Cactus once every spring or summer so that you can have a good look at the health of its roots. Some people also believe that introducing the cactus to fresh soil can boost its growth.