Titanopsis Species, Concrete Leaf Living Stone, Jewel Weed

Titanopsis calcarea

Family: Aizoaceae (ay-zoh-AY-see-ee) (Info)
Genus: Titanopsis (ty-tan-OP-sis) (Info)
Species: calcarea (kal-KAR-ee-uh) (Info)
Synonym:Mesembryanthemum calcareum
Synonym:Titanopsis calcareum


Cactus and Succulents

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun

Sun to Partial Shade

Light Shade


Foliage Color:



under 6 in. (15 cm)


3-6 in. (7-15 cm)


USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

USDA Zone 11: above 4.5 C (40 F)

Where to Grow:

Can be grown as an annual


Unknown - Tell us

Bloom Color:

Bright Yellow

Bloom Characteristics:

Unknown - Tell us

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Winter/Early Spring

Mid Spring

Mid Winter

Other details:

Unknown - Tell us

Soil pH requirements:

6.6 to 7.5 (neutral)

Patent Information:


Propagation Methods:

From seed; winter sow in vented containers, coldframe or unheated greenhouse

From seed; sow indoors before last frost

From seed; direct sow after last frost

From seed; germinate in a damp paper towel

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Allow seedheads to dry on plants; remove and collect seeds

Properly cleaned, seed can be successfully stored


This plant is said to grow outdoors in the following regions:

Phoenix, Arizona

Calabasas, California

Los Angeles, California

Mission Viejo, California

Perris, California

Richmond, California

Riverside, California

Santa Maria, California

Henderson, Nevada

Roswell, New Mexico

Cleveland, Ohio

Grenoble, Rhône-Alpes

Richmond, Texas

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Gardeners' Notes:


On Nov 3, 2009, vossner from East Texas,
United States (Zone 8a) wrote:

This is a lovely succulent but it rots very quickly if too much moisture. One rainy day is all it will take. If more rain is in the forecast, cover it or it will surely die. I don't follow my own advice and have lost it twice, but since it can be found cheaply at the box stores in my area, I gladly buy a new one. After my first loss, I decided to never again provide supplemental water. It did great. Then the rains came and it rotted quickly. Again, withhold supplemental water and cover if more than one rainy day is expected.


On Dec 24, 2005, cacti_lover from Henderson, NV (Zone 9b) wrote:

Can also be found under the name Titanopsis calcareum. This plant is from South Africa. It can tolerates high heat and also down to 25F.


On Nov 5, 2005, cactus_lover from FSD,
Pakistan (Zone 10b) wrote:

Rosettes to 10 cm wide; leaves to 2.5 cm long with truncate tip densely covered with grey tubercles; yellow flowers.