Titanopsis calcarea, commonly known as Concrete Leaf Living Stone or Jewel Weed, is a unique mat-forming succulent from South Africa. It has small rosettes of thick fleshy grayish foliage with small warty idioblasts covering the end of the flaring leaf surface. The plant slowly forms a clump and produces a yellow flower. It stays cute and small, making it the perfect lizard-like addition for a container or rock garden, and can even be grown as a houseplant.
This species comes from a very arid desert region and is a little more difficult than some others to grow, as it will not tolerate over-watering.
Growing Conditions and General Care
Like many South African desert plants, Concrete Leaf Living Stone tends to become dormant or semi-dormant during the height of summer to conserve moisture. It is often a mistake during mid-summer to keep the plants wet, although they require some water during this period.
Titanopsis are all fairly similar plants and seem to make most of their growth in the fall, with another shorter burst in the spring. Flowers may be produced in fall, spring, or both. This charming little plant is worthy of a place in most collections. Concrete Leaf Living Stone is tolerant of temperatures down to 40 °F (5 °C) if kept fairly dry. Like most plants, it will benefit from good ventilation.
Concrete Leaf Living Stone should be kept in a bright sunny situation.
Water this succulent well during the spring, allowing the to dry between waterings. During the summer, the semi-dormant Concrete Leaf Living Stone should be watered sparingly to avoid any chance of it rotting. It should be watered and allowed to dry several times during the early fall, and then in winter, it should be kept fairly dry, only receiving enough water to prevent shriveling. This plant will soon rot if kept wet at low temperatures.
As a native of very arid areas, Concrete Leaf Living Stone will benefit from a dry atmosphere. Feed this succulent regularly every 1 to 2 weeks during the spring, using afood or one recommended for tomatoes at about half strength.
An extra gritty compost containing about half grit is recommended for this plant to reduce the chance of being overwatered. Repot about every two years.
Concrete Leaf Living Stone grows quickly from seed or by dividing larger clumps. Seeds are best sown in a warm, bright position in the early part of the year so that the plants are as large as possible before the onset of winter.
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