Saponaria Species, Rock Soapwort

Saponariaocymoides

Family
Caryophyllaceae (kar-ree-oh-fil-AY-see-ee)
Genus
Saponaria (sap-oh-NAIR-ee-uh)
Species
ocymoides (ok-kye-MOY-deez)
Synonym
Lychnis ocymoides
Saponaria ocymifolia
Saponaria repens
Saponaria viscosa
Sun Exposure
Full Sun
Foliage
Evergreen
Height
6-12 in. (15-30 cm)
Spacing
24-36 in. (60-90 cm)
Hardiness
USDA Zone 2a: to -45.5 °C (-50 °F)
USDA Zone 2b: to -42.7 °C (-45 °F)
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
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)
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)
Danger
Seed is poisonous if ingested
Bloom Color
Pink
Bloom Time
Late Spring/Early Summer
Blooms repeatedly
Other Details
Category
Alpines and Rock Gardens
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
May be a noxious weed or invasive
Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
By dividing the rootball
From softwood cuttings
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
From seed; sow indoors before last frost
Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Properly cleaned, seed can be successfully stored
Regional

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

Sahuarita, Arizona

Maumelle, Arkansas

Calistoga, California

Colorado Springs, Colorado

Loveland, Colorado

Danbury, Connecticut

Ridgefield, Connecticut

Seymour, Connecticut

Lewiston, Idaho

Albers, Illinois

Crystal Lake, Illinois

Plainfield, Illinois

Rockford, Illinois

Bremen, Indiana

Floyds Knobs, Indiana

Greenville, Indiana

Kimmell, Indiana

Atalissa, Iowa

Iowa City, Iowa

Urbandale, Iowa

Shawnee Mission, Kansas

Newtonville, Massachusetts

Blissfield, Michigan

Scottville, Michigan

Minneapolis, Minnesota

Billings, Montana

Wolf Point, Montana

Swanzey, New Hampshire

Denville, New Jersey

Albuquerque, New Mexico

Chittenango, New York

Wake Forest, North Carolina

Cincinnati, Ohio

Dundee, Ohio

Fremont, Ohio

Lima, Ohio

Orrville, Ohio

Williamsburg, Ohio

Bend, Oregon

Bethlehem, Pennsylvania

Crossville, Tennessee

Greeneville, Tennessee

Amarillo, Texas

Austin, Texas

Hereford, Texas

San Antonio, Texas

Salt Lake City, Utah

South Jordan, Utah

Tremonton, Utah

Lexington, Virginia

Suffolk, Virginia

Bellevue, Washington

Indianola, Washington

Port Townsend, Washington(2 reports)

Sequim, Washington

Spokane, Washington

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Featured Videos

Gardener's Notes:

3
positives
3
neutrals
1
negative
Sort By:
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R
| June 2019 | negative

Saponaria ocymoides
I have a new planting of these and they are slowly wilting and dying off. I have looked for the cause and have...Read More

W
Cincinnati, OH | May 2009 | positive

I've had soapwort in my garden for almost 10 years and it's one of my favorite ground covers. It keeps weeds out very well, and the love...Read More

S
Bethlehem, PA | February 2009 | positive

This plant was great in an urn in a hot, sunny dry part of my yard. After 2 - 3 weeks of beautiful blooming, I cut it back hard and the ...Read More

O
Denville, NJ (Zone 6b) | May 2008 | neutral

not real thrilled with it and it did not stay evergreen here... I had to cut back a bunch of browned growth in early spring

J
Scottville, MI (Zone 4b) | June 2004 | positive

Yes, it can be agressive, but it's easy to rip out chunks where you don't want them, and so pretty for 2-3 weeks. The foliage looks fine...Read More

U
Orrville, OH (Zone 6a) | May 2004 | neutral

Very prolific bloomer the second year established, but becomes leggy when downtrodded by harsh rains in the spring.

L
Grove City, OH (Zone 6a) | January 2003 | neutral

This makes a great nursery plant for areas where other, slower growing groundcovers are to be grown. It spreads very rapidly, preventing...Read More

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