Kalanchoe kewensis is a desirable succulent known for its unique charm and relatively straightforward care. Its distinct foliage and delicate blooms make it an attractive addition to indoor and outdoor settings.
Understanding Kalanchoe kewensis
Kalanchoe kewensis is an evergreen succulent with striking physical characteristics. Its foliage features an unusual “elk horn” form, with fleshy, elongated leaves displaying almost pinnate margins and an asymmetrical course. These bright green leaves can develop red or purple shades depending on the season and sun exposure. The plant also has a fuzzy texture. This hybrid succulent grows as a subshrub, reaching 1 to 4 feet tall and 1 to 2 feet wide. In spring and summer, it produces panicles of erect, star-shaped, light purplish-pink flowers. This plant originated as a hybrid at the Kew Botanical Gardens in 1901, believed to be a cross between Kalanchoe bentii and Kalanchoe flammea.
Optimal Care for Kalanchoe kewensis
Light Requirements
Kalanchoe kewensis thrives in bright, indirect light. Indoors, a south or west-facing window is ideal. While it tolerates some direct sunlight, prolonged exposure to harsh rays can cause leaf burn. Outdoors, it performs well in full sun to bright shade, benefiting from protection during intense afternoon sun. Inadequate light leads to leggy stems, indicating the plant needs more illumination.
Watering Practices
As a drought-tolerant succulent, Kalanchoe kewensis requires proper watering. Allow the soil to dry out completely between waterings to prevent root rot from excessive moisture. During spring and summer, water every one to two weeks. In winter dormancy, reduce watering to every three to four weeks. Before watering, check soil moisture by inserting a finger one to two inches deep; if dry, it is time to water.
Soil and Potting
A well-draining soil mix is crucial for Kalanchoe kewensis. A suitable blend includes general potting soil combined with a cactus or succulent mix, often in a 50/50 ratio. Incorporating horticultural sand, perlite, or pumice enhances drainage and aeration, preventing waterlogging. Pots with drainage holes, especially clay ones, help wick away excess moisture. The plant prefers a slightly acidic soil pH, ideally between 5.5 and 6.5.
Temperature and Humidity
Kalanchoe kewensis prefers consistent temperatures between 55°F and 85°F (13°C and 29°C). Protect the plant from frost, as freezing temperatures are detrimental. Bring outdoor plants indoors if overnight temperatures drop below 55°F (13°C). This succulent is not sensitive to humidity and tolerates low humidity well.
Fertilization
Fertilization supports vigorous growth and flowering in Kalanchoe kewensis. Apply fertilizer during the active growing season (spring and summer). Use a balanced succulent or general houseplant fertilizer monthly, or every two to four weeks. Follow product instructions to avoid over-fertilization, which can harm the plant. Reduce or stop fertilization entirely during fall and winter when growth slows.
Propagating Kalanchoe kewensis
Propagating Kalanchoe kewensis is straightforward, primarily through stem cuttings. The ideal time is late spring or summer, after blooming. Select a healthy stem two to three inches long with at least four to five leaves. Make a clean cut just above a leaf node and remove lower leaves.
After cutting, allow it to air dry for two to three days until a callus forms; this prevents rot. Plant the calloused cutting in a pot with well-draining succulent or cactus mix. Rooting hormone can encourage faster root development. Initially, mist the soil frequently to keep it slightly moist until roots establish, then transition to the mature plant’s watering schedule. Position the potted cutting in bright, indirect light for healthy growth.
Troubleshooting Common Issues
Overwatering frequently causes soft, mushy, or yellowing leaves, stem rot, and black spots on Kalanchoe kewensis. To correct this, reduce watering and ensure proper drainage. If roots are severely affected, repot into fresh, dry soil. Conversely, underwatering causes leaves to wilt or shrivel, signaling a need for more hydration.
Leggy growth indicates insufficient light; provide more bright, indirect light, and prune elongated stems to encourage bushier growth. Pests like aphids, mealybugs, spider mites, and scale insects can infest the plant, leading to distorted or yellowing leaves and stunted growth. Isolate affected plants and treat with insecticidal soap or neem oil. Fungal or bacterial leaf spots, appearing as black or brown areas, can develop if water lingers on foliage; water at soil level and improve air circulation to prevent this.