Notocactus apricus, commonly known as the Apricot Ball Cactus, is a popular South American native cherished for its distinctive appearance and vibrant blooms. It is a relatively easy-to-grow succulent, making it a favored choice for both novice and experienced gardeners.
Identifying Notocactus Apricus
The Notocactus apricus is a small, spherical cactus, typically 2 to 4 inches in height and width. Its light green stem can be solitary or produce 2 to 10 branches. The cactus features 15 to 20 distinct ribs, often nearly flat or somewhat curved.
Areoles, from which spines emerge, are orbicular and spaced about 3-4 mm apart, appearing tomentose when young. It produces 18-20 bristle-like, flexible radial spines that are yellowish or grayish-yellow. Additionally, there are usually four more developed central spines, up to 15 mm long, often brownish-reddish with darker tips.
Its striking, large, funnel-shaped flowers are often bright yellow with a red center, emerging near the apex. Outer perianth segments often display reddish middle stripes.
Notocactus Apricus Care
Light
Notocactus apricus thrives in bright light to encourage robust growth and abundant flowering. While it enjoys morning sun, it benefits from protection during intense midday summer sun to prevent scorching. A location with bright, filtered light, such as a southern, southeastern, or eastern exposure, is ideal.
Soil
A well-draining soil mix is crucial for the health of Notocactus apricus to prevent root rot. The ideal substrate should be rocky and sandy, allowing water to pass through quickly. Incorporating mineral components like pumice, perlite, or coarse sand helps ensure proper aeration for the fibrous roots. A mineral compost with minimal organic matter, such as peat, is often recommended.
Watering
Proper watering techniques are important for this cactus. During its active growing season in spring and summer, water regularly, allowing the soil to dry out completely between applications. As temperatures cool and the plant enters dormancy in winter, watering should be significantly reduced or stopped entirely. Overwatering during this dormant period can lead to root rot.
Temperature and Humidity
Notocactus apricus prefers warmer temperatures during active growth. During winter dormancy, it needs cooler, dry conditions, ideally 40°F to 50°F (5°C to 10°C), tolerating sporadic light frost if kept dry. High humidity is not preferred; good air circulation is beneficial.
Fertilizing
During the spring and summer growing season, Notocactus apricus benefits from a low-nitrogen, high-potassium fertilizer to support flowering and overall health. Dilute fertilizers to one-fourth to one-half the recommended strength to avoid over-fertilization. Cease fertilizing completely during fall and winter dormancy.
Propagating Notocactus Apricus
Notocactus apricus can be propagated from both seeds and offsets. Seeds can be sown in a well-drained, sandy soil mix in spring when temperatures are warm. Covering the seeds with a fine layer of grit and watering from below can aid germination. Maintain high humidity for the first one to two weeks, then gradually reduce it to help the seedlings establish.
For offsets, carefully remove the small plantlets that form around the base of the main cactus. Allow the cut surface to callus over for a few days to a week before planting them in a well-draining soil mix. This callusing process helps prevent rot. Plant offsets in spring, ideally around 68°F (20°C).
Common Problems and Solutions
Root rot is a frequent problem, primarily caused by overwatering, especially during cooler, dormant periods. If mushy stems or a soft base are observed, unpot the plant, trim away rotted sections, and replant in fresh, dry, well-draining soil. Allowing the soil to dry out completely between waterings is a key preventative measure.
Sun scorch occurs from excessive direct sunlight, particularly during summer’s hottest parts. This manifests as brown or discolored patches on the plant’s surface. Move the cactus to a location with bright, indirect light or provide afternoon shade. While scorch damage is irreversible, new growth will emerge if conditions improve.
Mealybugs occasionally affect Notocactus apricus. Manage them by dabbing with alcohol-soaked cotton swabs or using insecticidal soap, repeating treatments weekly until the infestation clears. Good air circulation also deters pests.