Cistanthe Species, Rock Purslane

Cistanthe grandiflora

Family: Montiaceae
Genus: Cistanthe (sis-TAN-thee) (Info)
Species: grandiflora (gran-dih-FLOR-uh) (Info)
Synonym:Calandrinia grandiflora
Synonym:Calandrinia spectabilis
Synonym:Calandrinia speciosa
Synonym:Cistanthe speciosa
Synonym:Claytonia grandiflora
View this plant in a garden




Water Requirements:

Drought-tolerant; suitable for xeriscaping

Sun Exposure:

Full Sun




Foliage Color:




12-18 in. (30-45 cm)


18-24 in. (45-60 cm)

24-36 in. (60-90 cm)


Not Applicable

Where to Grow:

Grow outdoors year-round in hardiness zone


Unknown - Tell us

Bloom Color:

Magenta (pink-purple)

Fuchsia (red-purple)

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Bloom Size:

Unknown - Tell us

Bloom Time:

Blooms all year

Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

From leaf cuttings

From herbaceous stem cuttings

Allow cut surface to callous over before planting

Seed Collecting:

Unknown - Tell us


This plant has been said to grow in the following regions:

Anthem, Arizona

Phoenix, Arizona

Tempe, Arizona

Alameda, California

Alamo, California

Aliso Viejo, California

Arroyo Grande, California

Auburn, California

Brea, California

Camarillo, California

Carmel, California

Cathedral City, California

Corona, California

Escondido, California

Hayward, California (2 reports)

Long Beach, California

Los Angeles, California

Napa, California

Palmdale, California

Pittsburg, California

Ramona, California

Richmond, California

Salinas, California

San Clemente, California

San Diego, California

San Francisco, California (4 reports)

San Jose, California

San Luis Obispo, California

San Pedro, California

Spring Valley, California

Valley Center, California

Vista, California

Walnut Creek, California

Las Cruces, New Mexico

show all

Gardeners' Notes:


On May 19, 2019, ellenfountain from Tucson, AZ wrote:

LOVE this plant! I bought a 1-gallon from a local nursery last spring, and it just took off. It didn't even blink at our 18 degree low or any of the other freezing nights this past winter here in Tucson (Arizona).

It is in a large 18" diameter pot, under a desert willow tree where it gets filtered sun in the summer, and full sun in the winter when the willow drops its leaves. In the first year, it has completely filled the pot from edge to edge. It started blooming in March and has not stopped yet. I just cut off several pieces and have started them in other places in my yard (in ground, using mostly sand and cactus blend potting soil mix).


On Sep 7, 2017, miho from auburn,
United States wrote:

Planted it in a mixture of sand and gravel. Made in thru 20 degrees @ night, and 55 inches of rain here. Needs good drainage. Took off in the Spring. Give it room to spread, don't try to cramp it. Supplier said it was hardy to 15 degrees.


On Jan 26, 2017, Mildcat from Escondido, CA (Zone 10a) wrote:

I got a Calandrinia (aka Cistanthe) cutting from a friend. It rooted easily and I planted it in my succulent bed. After a few months it was galloping in all directions and threatening to take over the entire large bed. I tore the whole thing out and stuck a few stems into two half-barrel planters, where it has flourished. The lush gray-green foliage drapes beautifully over and down the sides of the pots, and the dainty purple cistus-like flowers on vertical stems form a floating mass above. I throw a bucket of water over them from time to time in the summer, and cut back the stems that are aiming to root themselves in the soil around the half-barrels, but that's pretty much all the care it needs. I root several cuttings a year to give away. We're about 15 miles from the coast in South... read more


On Sep 10, 2016, friscochase from San Francisco, CA wrote:

This plant has been heavily used in San Francisco but after two years of spectacular growth and flowering, the plants are dying out quite dramatically throughout much of the city. It was listed as disease and pest free but something is going on and it doesn't seem to matter whether it was planted near the coast or in a sunny area. The leaves turn a yellow to pinkish color then die, the plant then succumbs quickly. The majority are planted in open areas, little to no water, good air circulation, full sun, great drainage (sandy soils mostly.) Any suggestions?


On Sep 7, 2015, hondoco from Santa Ana, CA wrote:

still learning


On Jan 23, 2015, poeciliopsis from Phoenix, AZ wrote:

Central Phoenix -- I have variable luck with Calandrinia spectabilis. But it is so lovely I don't mind growing it as an annual. It is easily rooted from cuttings. I often lose it to summer heat but it survives winter, including this winter's freeze of 26F. I grow it in partial shade, and it seems to want more sun, but a plant I tried in half day sun did not survive.


On Feb 12, 2013, AmanitaM from Portland,
United States wrote:

I read on a seller's site that this plant is Zone 8 hardy. So I put it to the test, and my Zone 9 winter (24F) nearly killed it, but I believe it will resprout. It *might* be Zone 8 hardy with a dry winter, something I will never see here in Portland.


On Jul 20, 2012, Susi_So_Callif from Vista, CA (Zone 10a) wrote:

This plant is wonderful - carefree and quick to multiply. I believe it is the same plant identified elsewhere as Calandrinia grandiflora.


On Dec 8, 2011, boomboer from Cape Town,
South Africa wrote:

What a nice addition to any garden - the magenta pink poppy-ish flowers float over a thick carpet of bluegreen echeveria-like foliage down below.
A word of warning - when Calandrinia is happy - it simply explodes in growth! A plant with one rosette can grow to a clump with 30+ rosettes, 2 to 3 feet in diameter in a single spring and summer...
Growth can be curbed by limiting water, but it responds well to pruning also and you can root the cuttings and give to friends and family - spread the joy.


On Jan 17, 2010, annlof from Camarillo, CA wrote:

For people who live in dry, cool climates like coastal California, this plant is a real winner. I can't see why it isn't planted more often! The succulent blue-green foliage is very attractive at all times, and the purple-magenta flowers seem to float above the plant for months on end. Don't deadhead! Each stem keeps producing flowers for many weeks. Calandrinias need cool summers and excellent drainage, lots of sun and little water. This site recommends spacing 12 inches apart but my plants quickly grew to 2-3 feet wide. Pruned branch tips root easily in moist sand.