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PlantFiles: Texas Mountain Laurel
Calia secundiflora 'Silver Peso'

Family: Papilionaceae (pa-pil-ee-uh-NAY-see-ee) (Info)
Genus: Calia
Species: secundiflora (sek-und-ee-FLOR-uh) (Info)
Cultivar: Silver Peso

Synonym:Sophora secundiflora

7 members have or want this plant for trade.


8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)
12-15 ft. (3.6-4.7 m)
15-20 ft. (4.7-6 m)

8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)
12-15 ft. (3.6-4.7 m)
15-20 ft. (4.7-6 m)

USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
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)

Sun Exposure:
Full Sun
Sun to Partial Shade

All parts of plant are poisonous if ingested

Bloom Color:

Bloom Time:
Late Winter/Early Spring


Other details:
Flowers are fragrant
Drought-tolerant; suitable for xeriscaping
This plant is resistant to deer

Soil pH requirements:
8.6 to 9.0 (strongly alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
From seed; stratify if sowing indoors
Scarify seed before sowing

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds

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3 positives
No neutrals
No negatives

Gardeners' Notes:

Positive poeciliopsis On Mar 7, 2015, poeciliopsis from Phoenix, AZ wrote:

Central Phoenix -- My Sophora secundiflora (aka Calia secundiflora) grows in a less than ideal location, under the shade of a pecan tree. However, it does get several hours of afternoon summer sun and it seems happy, although a bit lanky. It receives every-other-week water in summer and none in winter. The purple blooms look really great against the gray-green foliage.

Positive vossner On Feb 1, 2013, vossner from Richmond, TX (Zone 9a) wrote:

Rating it neutral as newly planted in my garden (Feb 2013). I am most excited about its silver foliage. Looks exactly like the regular TxML, but with velvety leaves. I plan to grow it as a standard.

APRIL 2014. Changing rating to positive as it is doing well in full sun and dryish area of my garden. Towards Fall 2013, most of the foliage turned green and I was afraid it had reverted; however, in Spring 2014 all new foliage is that lovely, silvery, velvety color.

Positive olmpiad On Mar 10, 2009, olmpiad from Dallas, TX (Zone 8a) wrote:

A beautiful cultivar of the classic Texas Mountain Laurel. Silver Peso generally does not grow as big as the Texas Mountain Laurel, and because of this, is preferred by some who are wishing to use it for Xeriscaping. The leaves of Silver Peso also have a silvery-tinge to them, kind of like Texas Sage. I have found that the flowers are a little deeper purple, and a bit more "floral" in scent than the Texas Mountain Laurel (however, the grape-koolaid smell is still quite apparent). A man at a local nursery said that it is more open to pruning into a tree-shape than the Texas Mountain Laurel. As with the Texas Mountain Laurel, the seeds contain Cytisine, and are extremely toxic, so ensure that they stay away from any kids or critters you may have around the plant! Otherwise, it's a beauty for any garden that it can handle.


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

Goodyear, Arizona
Mesa, Arizona
Phoenix, Arizona
Tucson, Arizona
Los Angeles, California
College Station, Texas
Dallas, Texas
El Paso, Texas
Richmond, Texas
San Antonio, Texas
Spicewood, Texas

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