Crassula rogersii aka Roger's Crassula

Crassula rogersii is a compact, slow-growing succulent that typically reaches 15-30 cm (6-12 inches) in height and can spread up to 30 cm (12 inches) wide. It forms a dense, cushion-like growth habit with multiple branching stems. The plant develops a woody base as it matures, and its club-shaped, velvety leaves create an attractive, tight clump that makes it ideal for container cultivation or small spaces in rockeries.

Crassula rogersii thrives in average room temperatures between 18-24°C (65-75°F). It can tolerate minimum temperatures down to about 10°C (50°F), though some sources suggest it may briefly survive light frosts to -1°C (30°F). This succulent is not cold-hardy and should be brought indoors or protected when temperatures drop below 10°C. In hot weather, provide some afternoon shade to prevent leaf scorching.

Crassula rogersii experiences summer dormancy, so reduce watering during hot months and allow the plant to rest. Active growth occurs in autumn, winter, and spring when watering can be slightly increased. During winter, expect flowering with small white or pale yellow blooms. If growing outdoors in temperate climates, bring the plant inside before first frost. Year-round, maintain bright indirect light and ensure the soil dries completely between waterings regardless of season.

Crassula rogersii produces charming clusters of tiny, star-shaped flowers in late winter to early spring. The flowers are typically pale yellow to white in color and appear on elongated stems (thyrses) that can reach up to 20 cm long. The blooms are often fragrant, adding extra appeal. Flowering is more likely when the plant receives adequate bright light and experiences slight temperature drops during autumn and winter.

Crassula rogersii can be grown outdoors year-round in USDA hardiness zones 9b-11, where temperatures stay above -1°C (30°F). In its native Eastern Cape of South Africa, it grows among rocks in dry river valleys. For colder climates, grow it in containers that can be moved indoors during winter. Outdoors, provide partial sun with protection from intense afternoon heat. The plant is excellent for rockeries, succulent gardens, and containers on patios.

Crassula rogersii is endemic to the Eastern Cape Province of South Africa, specifically in the region spanning from Willowmore through Port Elizabeth to Port Alfred. It grows naturally in dry river valleys among rocks and scrub within two distinct biomes: the Albany Thicket and Succulent Karoo regions. The species is named after Frederick A. Rogers (1876-1944), an English missionary and amateur botanist who documented South African flora from 1904.

Crassula rogersii propagates easily through stem cuttings or leaf propagation. For stem cuttings, take a 7-10 cm section just below a node, let it callous for 2-3 days, then plant in well-draining succulent soil. For leaf propagation, gently twist a healthy leaf from the stem (ensuring a clean break), allow it to dry and callous for several days, then lay it on moist soil. The best time to propagate is during the active growing season in spring or autumn. Roots typically develop within 4-6 weeks.

Repot Crassula rogersii every 2-3 years or when it becomes root-bound. The best time is during spring at the start of the growing season. Choose a pot only slightly larger than the current one, as succulents prefer snug containers. Use a terracotta pot with drainage holes and fresh, well-draining succulent soil. Allow the soil to dry before repotting, and wait a week after repotting before watering to let any damaged roots heal.

Crassula rogersii rarely requires pruning due to its compact growth habit. However, you can trim leggy stems to encourage bushier growth or remove spent flower stalks after blooming. Use clean, sharp scissors or pruning shears to make cuts just above a leaf node. The cuttings can be propagated to create new plants. Remove any dead or damaged leaves as needed to maintain the plant's appearance and prevent potential pest or disease issues.

Crassula rogersii is susceptible to mealybugs (appearing as white cottony masses), scale insects, spider mites (look for fine webbing), and aphids. The most common disease is root rot caused by overwatering, which shows as yellowing leaves, mushy stems, and black roots. Fungal infections can occur in humid conditions. Treat pests by wiping with rubbing alcohol or using insecticidal soap. Prevent diseases by ensuring excellent drainage, allowing soil to dry between waterings, and providing good air circulation.

Yellow leaves on Crassula rogersii typically indicate overwatering, which is the most common problem with this succulent. When roots sit in waterlogged soil, they begin to rot, and the plant cannot absorb nutrients properly, causing leaves to yellow and become soft or mushy. Check the roots for signs of rot (black or brown, mushy texture). If caught early, let the soil dry completely and reduce watering frequency. In severe cases, repot in fresh dry soil and remove any rotten roots.

Drooping or wilting in Crassula rogersii can indicate either overwatering or underwatering. With overwatering, stems become soft and mushy as root rot sets in—check for soggy soil and damaged roots. With underwatering (less common in succulents), leaves may appear shriveled and the plant looks deflated. Feel the soil: if it's wet and the plant is drooping, stop watering and let it dry completely. If the soil is bone dry and the plant is shriveled, give it a thorough watering and it should recover within a day or two.

Crassula rogersii is naturally a slow-growing succulent, so some slow growth is normal. However, if growth seems particularly stunted, check these factors: insufficient light (move to a brighter location), nutrient deficiency (feed with diluted succulent fertilizer in spring/autumn), root-bound conditions (repot if roots are circling the pot), or dormancy (growth naturally slows in summer). Extreme temperatures, either too hot or too cold, can also cause growth to pause.

Caring for Roger's Crassula is a breeze, as it is highly adaptable and forgiving to minor neglect.

Roger's Crassula does best in dry soil and should only be watered sparingly.

When growing the Roger's Crassula, it's important to use a potting soil that is well-draining and does not retain excessive moisture. An optimal soil mix should contain a high proportion of perlite or vermiculite for good drainage and some organic matter for nourishment. Simply add a few scoops of perlite to regular cactus soil to achieve this.

Roger's Crassula requires abundant, bright, and direct light to thrive. The best placement for this plant is within one foot of a window to ensure it receives enough light. If you live in an area with more extreme weather, such as hot summers or cold winters, you may need to adjust the placement of the plant accordingly. During hot summer months, it is important to place the plant away from full sun, as this can cause the leaves to yellow or burn. During cold winter months, it is best to move the plant closer to the window to take advantage of the extra light that can help it survive. By keeping an eye on the current weather in your area, you can make sure your Yellow Crassula is always in the right place to thrive.

Roger's Crassula plants thrive in dry environments, however, if you choose to provide extra humidity or mist your plant, the lingering water on the leaves can create an ideal environment for certain types of harmful fungi.

The Roger's Crassula grows at a slow pace and doesn't require any supplementary fertilizers. By renewing its potting soil once a year, it should receive enough nourishment. Remember, plants obtain their energy from sunlight, not fertilizers.

Ploi lacks confirmed information on the toxicity of this plant. If you, a relative, or your pet accidentally consume plant material with unknown toxicity, it's best to consult a medical expert.