Photo by Melody

PlantFiles: Giant flowered Soapwort
Saponaria x lempergii 'Max Frei'

Family: Caryophyllaceae (kar-ree-oh-fil-AY-see-ee) (Info)
Genus: Saponaria (sap-oh-NAIR-ee-uh) (Info)
Species: x lempergii
Cultivar: Max Frei

2 vendors have this plant for sale.

One member has or wants this plant for trade.

Alpines and Rock Gardens

6-12 in. (15-30 cm)

15-18 in. (38-45 cm)

USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
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)

Sun Exposure:
Full Sun
Sun to Partial Shade

Unknown - Tell us

Bloom Color:

Bloom Time:
Late Summer/Early Fall


Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:

Propagation Methods:
Unknown - Tell us

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed


2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive coriaceous On Mar 12, 2015, coriaceous from ROSLINDALE, MA wrote:

Very showy flowers, with an exceptionally long season of bloom, from June till frost. The flowers are no larger than those of other soapwort species. Plants can be short-lived---excellent drainage is essential.

Sterile, can be propagated by rooting cuttings. The woody rootstock is difficult to divide.

This is a hybrid between S. cypria and S. sicula var intermedia (aka S. haussknechtii) made in mid-twentieth century Austria by Fritz Lemberg. 'Max Frei' is the only cultivar.

Positive pokerboy On Aug 21, 2004, pokerboy from Canberra
Australia (Zone 8b) wrote:

Very pretty flowering perennial. Likes full sun and well-drained soil. Very pretty white of pink flowers in Summer. pokerboy.


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

Roslindale, Massachusetts
Enid, Oklahoma

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