The Cinder Plant, Plectranthus ciliatus, is an ornamental plant known by common names such as Speckled Spur Flower, Eyelash Spur-Flower, or Trailing Coleus. Its dark, rich foliage adds depth and texture to gardens or indoor spaces. Its visual appeal and straightforward care make it widely popular.
Understanding Cinder Plant
Plectranthus ciliatus is a low-growing, trailing, or creeping herb, reaching up to 2 feet tall. Its stems often have fine purple hairs. The leaves are broadly elliptic to ovate, with short, stiff hairs and often a striking purple underside, giving it a dark appearance. The leaf margins are noticeably hairy with shallow teeth.
The Cinder Plant is native to southeastern Africa, in South Africa and Eswatini. It thrives in moist, well-wooded afromontane and subtropical forests, preferring frost-free, damp, and shady environments on the forest floor. These conditions inform its ideal cultivation requirements.
Caring for Cinder Plant
Light
Cinder Plant flourishes in bright, indirect light. Too much direct sunlight can cause its foliage to bleach or scorch. Conversely, insufficient light can lead to fading purple hues, and the plant may become leggy.
Water
Consistent soil moisture benefits the Cinder Plant, but it should never be waterlogged. The plant appreciates regular watering, allowing the top inch or two of soil to dry out between waterings. Overwatering can lead to root rot, requiring proper drainage.
Soil
A well-draining soil mix rich in organic matter is optimal. It performs best in soil that retains moisture but drains freely. A slightly acidic to neutral pH range is preferred for healthy growth.
Temperature and Humidity
Plectranthus ciliatus prefers moderate temperatures and thrives in average to high humidity. It is not tolerant of frost, and temperatures below 41°F are detrimental. For indoor plants, maintaining a consistent room temperature is suitable. Occasional misting can help provide the moist atmosphere the plant enjoys.
Fertilizer
During its active growing season, Cinder Plant benefits from regular fertilization. A balanced liquid fertilizer, diluted to half strength, applied every four to six weeks supports healthy growth and vibrant foliage. Fertilization should be reduced or halted during the plant’s dormant period.
Propagating Cinder Plant
Propagating Cinder Plant is straightforward using stem cuttings. The ideal time to take cuttings is during spring or early summer. Select healthy stems 3 to 6 inches long, removing leaves from the bottom half to expose the nodes.
Cuttings can be rooted in water or a well-draining soil mix. For water rooting, place the cuttings in a jar with water, changing it every few days; roots develop in 2-3 weeks. For soil rooting, insert the leafless portion into a moist potting medium, with nodes beneath the surface, and keep the soil consistently damp. Once rooted, transplant into individual pots.
Common Problems and Solutions
Leggy growth, characterized by long, stretched stems with sparse foliage, often indicates insufficient light. Moving the plant to a brighter location with indirect light can help. Regular pruning and pinching back the tips will also encourage bushier, more compact growth.
Yellowing leaves can signal either overwatering or underwatering. If the soil is consistently soggy, it suggests overwatering and potential root rot, requiring reduced watering and improved drainage. If the soil is excessively dry, it indicates underwatering, and a more consistent watering schedule is needed. Nutrient deficiencies can also cause yellowing, which can be addressed with appropriate fertilization.
Cinder Plants can occasionally encounter pests such as spider mites, mealybugs, and aphids. Symptoms include small webs, sticky residue, or visible insects. These pests can be managed with insecticidal soap or neem oil applications. Good air circulation also helps prevent pest and fungal issues.