Mammillaria decipiens

Originating from arid regions, the Bird's nest cactus does best in full sun, since its native habitat features intense sunlight and little shade. It will also tolerate partial sun, which gives it some flexibility in where it can grow.

Although the Bird's nest cactus can tolerate some heat, it mainly thrives and grows in cooler seasons and becomes dormant in summer. In hot summer temperatures, provide shade to avoid scorching from intense sunlight. Watering should be reduced or stopped during the hottest season to prevent root rot. Winter and spring are when it undergoes vigorous growth. As long as temperatures do not drop too low, it will continue to grow steadily.

Apply a light amount of fertilizer once or twice a year during the growing season. Do not fertilize in winter or summer, when the plant is dormant. Use less fertilizer for repotted plants and wait a couple of months after repotting before you begin fertilizing. Fertilizing promotes healthy growth and encourages blooming.

Repot a bird’s nest cactus in spring or summer, choosing a pot just slightly larger than the current one with adequate drainage. Use a sandy or gritty cactus mix that drains well. Handle the plant gently to avoid its spines. Allow the cactus to dry out before repotting to help prevent root rot. After repotting, wait one week before watering so the roots can heal.