It's advisable to bring your
Fairy castle cactus indoors to avoid the harsh winter conditions. People opt to buy different types of grow light to provide enough sunlight for the plant. However, if your home is not extremely dark, it is not essential to buy these lights. Keep your plants where they will get the most sunlight possible. There should be sufficient light to keep the
Fairy castle cactus thriving in winter. If you have several
Fairy castle cactus, then keep them rotating so that they all receive enough sunlight.
Avoid placing your
Fairy castle cactus too close to the window if you live in northern areas with frigid weather. The cold may be extreme to them, due to which they might get damaged.