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The Walking Crow's Guide to Plants and Gardening
The Concrete Leaf Plant, also known as the Jewel Plant, is a mesmerizing succulent native to South Africa that captivates with its unique, stone-like appearance. Its fleshy, grey-green leaves are densely covered in rough, white tubercles, giving the plant a remarkable resemblance to concrete or limestone.
- Genus: Titanopsis
- Species: Titanopsis calcarea
- Growing Zone: Thrives in USDA Hardiness Zones 9-11. In colder climates, it can be grown as a houseplant or in a greenhouse.
- Origin: Endemic to the arid regions of South Africa and Namibia.
- Toxicity: Titanopsis calcarea is generally considered non-toxic to humans and pets.
- Health Benefits: While it doesn’t have direct health benefits, like many succulents, it can contribute to improved indoor air quality by absorbing carbon dioxide during photosynthesis.
- Soil: Requires well-draining soil, such as a cactus or succulent mix. Ensure adequate drainage to prevent root rot.
- Sunlight: Needs plenty of sunlight. Aim for at least 6 hours of direct sunlight per day. Insufficient light can lead to etiolation (stretching and weakening).
- Water: Extremely drought-tolerant. Water infrequently, allowing the soil to dry out completely between waterings. Overwatering is a common cause of death for this plant.
- Temperature: Tolerates a wide range of temperatures but prefers warm conditions. Protect from frost.
- Fertilizer: Light feeder. Fertilize once or twice during the growing season (spring and summer) with a diluted, balanced liquid fertilizer or a specialized succulent fertilizer.
- Pruning: Minimal pruning is required. Remove any dead or damaged leaves.
- Propagation: Can be propagated from seeds or offsets.
- The Concrete Leaf Plant is a slow-growing succulent that forms rosettes up to 3 inches (7.5 cm) in diameter.
- Its leaves are thick, fleshy, and club-shaped, with truncated tips covered in bumpy, white tubercles.
- It produces bright yellow, daisy-like flowers in fall and winter, adding a splash of color to its stony appearance.
- This plant is relatively pest and disease resistant but can be susceptible to mealybugs and root rot.
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