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:Claytonia grandiflora
View this plant in a garden



Tropicals and Tender Perennials

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Sun Exposure:

Full Sun


Foliage Color:



12-18 in. (30-45 cm)


6-9 in. (15-22 cm)


USDA Zone 9a: to -6.6 C (20 F)

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:

Grow outdoors year-round in hardiness zone


Unknown - Tell us

Bloom Color:

Magenta (pink-purple)

Bloom Characteristics:

Unknown - Tell us

Bloom Size:

Unknown - Tell us

Bloom Time:

Mid Summer

Late Summer/Early Fall

Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

By dividing the rootball

From seed; direct sow outdoors in fall

Seed Collecting:

Bag seedheads to capture ripening seed

Properly cleaned, seed can be successfully stored


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

Albany, California

Brentwood, California

Camarillo, California

Carmichael, California

Culver City, California

Encinitas, California

Eureka, California

Fremont, California

Hayward, California

Lemoore, California

Long Beach, California

Los Altos, California

Martinez, California

Menlo Park, California

Mountain View, California

Oakland, California

Oceanside, California

Pebble Beach, California

Pleasant Hill, California

Riverside, California

San Diego, California

San Francisco, California (2 reports)

San Jose, California

San Leandro, California

Spring Valley, California

Vista, California

Yorba Linda, California

Fort Lauderdale, Florida

New Orleans, Louisiana

Richmond, Texas

show all

Gardeners' Notes:


On May 13, 2019, 3acreDave from Albany, CA (Zone 10a) wrote:

Its growth habit makes many, many "branches" from a single "trunk", so it has effectively kept down a lot of weeds. I'm hoping I can put down cardboard all around the trunk and keep even more weeds down.

But keep it away from sprinkler fixtures or other things that are flat on the ground. Those many arms will cover it so effectively it can be forgotten.

I also agree with BAT: more sun, longer blooming. One patch here gets full sun nearly all day and blooms probably 8 months.


On Apr 19, 2018, BayAreaTropics from Hayward, CA wrote:

Very easy and a fast grower. Only,getting the best blooms you need full sun all day,the less of that,the less blooms. Also,in part sun it will bloom in spring and then pretty much stop..even as the foliage grows at light speed.
Sun,sun,sun for success.


On May 18, 2017, shirlslaw from Hewitt, TX (Zone 8a) wrote:

I also live in Central Texas and had pretty much the same experience....twice. The first time I purchased a gorgeous hanging basket and hung it over my porch. I blamed the wind when all of the blossoms eventually turned brown and fell off. The second attempt was the following Spring. I purchased several plants and put them in a sunny flowerbed with pretty much the same result. We were in the middle of a drought both years. Maybe I will try again this year; third time's a charm!


On May 17, 2017, halcyonbird from Kingsland, TX wrote:

Does this plant bloom over a long period of time, or rebloom throughout the Spring-Summer-Fall? I bought one, in full bloom and it was glorious. The next time I looked it had not one bloom on it, although it still had all the plant parts, so no likely it was bitten off by something..just all the petals were gone. Was hoping someone would report back, or tell me to wait for it to rebloom? If so will it reset blooms this season (it is mid May in Central Texas now).

Thank you for any information!


On Sep 26, 2014, jroberts123 from Jackson, CA wrote:

I love this plant. So beautiful and whimsical with its continuous magenta blooms. The rosettes at the base doubled in number from spring to summer. My only problem has been the deer. They did not bother the plants until late August and they ate them down to the stems. Luckily, leaves are forming along the stem, but I will definitely find a safer place - away from the deer, or plant lavender in front as a deterrent.


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 spectabilis.


On Sep 21, 2011, diaph from Culver City, CA wrote:

This is a fantastic plant. It is easily propagated from cuttings. My one cutting stuck in a big planter last fall became the photo uploaded here by July. It gets West sun and have only watered it once all summer (but it's been a cool summer in Culver City, CA).


On Feb 9, 2005, Ursula from Santiago,
Chile (Zone 9b) wrote:

This Chilean Native species grows as well in sandy soils at the coastal areas (where it blooms almost year-round) as inlads, at the foot of the Andes Mountains or in the Atacama Desert after the rare occurance of rainfall (where it blooms during Spring), always in full sun positions. Adecuate for xeriscaping. Good drainage is a must.

The fleshy leaves from an attractive basal rosette, with 50/60 cm long flower stems. Flowers can reach a diameter of up to 6 cm.

This plant can be propagated either from seeds or from separating rootballs.

Sow outdoors is Autumn on a mix of equal parts of river sand and regular garden soil. cover this mixture with a thin layer of pure sand, scatter your seeds and cover the thinly with more sand. Plants grown fr... read more