How to Grow and Care for Delosperma sphalmanthoides

Delosperma sphalmanthoides is a unique succulent and a rewarding experience for plant collectors. Native to high-altitude regions of South Africa, it is a dwarf species that forms a compact mat of foliage. The plant is characterized by its small, blue-green, fleshy, finger-like leaves that appear almost crystalline. This succulent has a swollen, woody base known as a caudex, which stores water. In early spring, it produces surprisingly large, magenta, daisy-like flowers that can obscure the plant.

Essential Care Guide

Light

This succulent thrives in bright, indirect sunlight. A location that receives at least six to eight hours of sun daily is suitable. While some direct morning sun is advantageous, it should be shielded from intense afternoon sun. Harsh sunlight, especially in hotter climates, can cause the delicate leaves to scorch.

Soil

Proper soil is significant for the health of Delosperma sphalmanthoides. The plant requires an exceptionally well-draining and gritty soil mixture to prevent moisture from accumulating around its roots. A commercial potting mix for cacti and succulents is a good base. Amending this with a high percentage of inorganic materials like pumice or perlite will improve drainage, mimicking its natural rocky habitat.

Water

The “soak and dry” method is the standard approach for watering this plant. Water the soil thoroughly, then allow it to dry out completely before the next watering. Its succulent nature makes it highly sensitive to overwatering, which can lead to root decay. You can check the soil’s moisture by feeling the top inch; if it is dry, it is time to water.

Temperature and Hardiness

Delosperma sphalmanthoides prefers moderate temperatures and is not tolerant of frost. It is hardy in USDA zones 5 through 9, though it can handle colder temperatures if the soil remains dry. It must be protected from freezing conditions, as prolonged exposure to frost can damage or kill the plant. For container-grown specimens, moving them to a sheltered location during winter is recommended.

Understanding the Growth Cycle

This Delosperma species has a growth pattern different from many other succulents. It is a winter grower, meaning its active growth period occurs during the cooler months of fall, winter, and early spring. During this time, the plant produces new leaves and its vibrant flowers. This cycle is an adaptation to its native habitat in South Africa’s winter rainfall regions.

During its active season, the plant can be watered more regularly, whenever the soil has fully dried out. This is also the only time of year to apply a diluted, balanced fertilizer. As temperatures rise with the onset of summer, the plant enters a period of dormancy.

During its summer dormancy, the plant may appear to decline, which is a normal survival mechanism. It is important to drastically reduce watering frequency in these months. Provide just enough moisture to prevent the caudex and roots from completely shriveling. Generous watering while the plant is dormant is a common mistake and a frequent cause of root rot.

How to Propagate

Multiplying Delosperma sphalmanthoides is most effectively done through stem cuttings. This method is best performed during the plant’s active growing season in the fall or winter for the highest chance of success. To begin, select a healthy stem and take a cutting that is a few inches long, removing the leaves from the bottom portion.

Allow the cut end of the stem to dry and form a callus for a few days. This step helps prevent the cutting from rotting when it is planted. Once the callus has formed, insert the cutting into a well-draining soil mix. Keep the soil lightly moist until roots begin to develop, which can take a few weeks.

Troubleshooting Common Problems

The most significant issue affecting this plant is root rot, which is almost always caused by overwatering or poor drainage. Signs of root rot include a soft, mushy caudex and yellowing, wilting leaves. This condition is often irreversible, underscoring the importance of proper watering, especially during summer dormancy.

Pests are not a frequent problem, but mealybugs can appear. These small, white insects can be found in the crevices between leaves. They can be removed by dabbing them with a cotton swab dipped in rubbing alcohol. Regularly inspecting the plant can help catch any pest issues before they become widespread.

A shriveled appearance can be a sign of two different things. If the plant looks shriveled during its active growing season, it may be underwatered. If it appears shriveled during the hot summer months, this is likely a sign of normal dormancy, and you should avoid the temptation to water it heavily.