How to Grow and Care for Boobie Cactus

The Boobie Cactus, known for its playful nickname, is a unique plant that catches the eye of many collectors. Scientifically, it is a specific Japanese cultivar named Myrtillocactus geometrizans ‘Fukurokuryuzinboku’. This cactus is a monstrose form of the more common Blue Candle Cactus, meaning it grows in an unusual, mutated way. Its appearance is defined by lumpy, rounded tubercles that grow along its blue-green stems, giving it a bumpy and sculptural look that has led to its memorable name.

Boobie Cactus Care

Light

Proper lighting helps maintain the health and unique shape of this cactus. It thrives in bright, indirect sunlight for at least six hours a day. An ideal indoor location is near a south-facing window. While it can tolerate some direct sun, shield it from intense, prolonged exposure during peak summer afternoons, which can cause sunburn. If moving the plant to a brighter location, acclimate it over several days to prevent scorching.

Soil

The right soil mixture is important for preventing moisture issues. This plant requires a well-draining soil that does not hold excess water. A commercial cactus or succulent mix is a great starting point, but amending it with materials like perlite or pumice will improve its drainage. Using a pot with drainage holes is also a necessity, as it allows excess water to escape freely.

Water

Watering for this cactus should follow the “soak and dry” method. This involves thoroughly watering the plant until water runs out of the pot’s drainage holes, and then waiting for the soil to dry out completely before watering again. You can check the soil’s moisture by sticking a finger about two inches deep. During the spring and summer growing season, watering might be every few weeks, but you must reduce it significantly in the fall and winter when the plant is dormant.

Temperature and Humidity

This cactus prefers conditions that mimic its native desert environment. The ideal temperature range is between 65°F and 85°F (18°C to 29°C). It is not frost-tolerant and should be protected from temperatures that dip below 50°F (10°C). Good air circulation is also important, as stagnant air can contribute to fungal problems.

Fertilizer

During its active growing season in the spring and summer, the Boobie Cactus benefits from occasional feeding. Use a fertilizer formulated for cacti and succulents, diluted to half-strength, about once a month. It is important to stop fertilizing entirely in the fall and winter, as the plant enters a dormant phase.

Propagating Boobie Cactus

Propagating this cactus is best done with cuttings during the spring or summer. Carefully remove a tubercle or small stem section using a clean, sharp knife. Allow the fresh cut to dry and form a callus over a couple of weeks. This hardening process is important because it prevents the cutting from rotting when planted.

Once the cutting has callused, plant it in a pot with dry, well-draining cactus mix. Do not water it immediately. Place it in a warm location with bright, indirect light to encourage root development. After a few weeks, you can begin to water it sparingly, and roots should begin to form.

Common Problems

The most frequent issue is root rot, a direct result of overwatering. Signs include a soft, mushy, and dark brown area at the base of the plant. Another issue to watch for is shriveling stems. This can be a sign of underwatering, but it can also occur when rotted roots can no longer absorb moisture.

Mealybugs and scale are the most common pests. These can be managed by spotting them early and dabbing the pests with a cotton swab dipped in isopropyl alcohol. Regular inspection is the best way to catch these issues before they become widespread.