Photo by Melody

PlantFiles: Soapwort
Saponaria lutea

Family: Caryophyllaceae (kar-ree-oh-fil-AY-see-ee) (Info)
Genus: Saponaria (sap-oh-NAIR-ee-uh) (Info)
Species: lutea (LOO-tee-uh) (Info)

One vendor has this plant for sale.

Alpines and Rock Gardens

6-12 in. (15-30 cm)

24-36 in. (60-90 cm)

USDA Zone 6a: to -23.3 C (-10 F)

Sun Exposure:
Full Sun

Seed is poisonous if ingested

Bloom Color:
Pale Yellow

Bloom Time:
Late Spring/Early Summer
Blooms repeatedly


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:
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

Click thumbnail
to view:

By altagardener
Thumbnail #1 of Saponaria lutea by altagardener


1 positive
1 neutral
No negatives

Gardeners' Notes:

Neutral altagardener On Oct 28, 2012, altagardener from Calgary, AB (Zone 3b) wrote:

You may be talking about some other Saponaria sp. but it's definitely not Saponaria lutea, which is a very small alpine Saponaria with pale white-yellow flowers.

Positive CactusSpike On Jun 2, 2011, CactusSpike from Sydney
Australia wrote:

I tried this plant because it was amongst a bunch of cheap herbs I bought in bulk. I was pleasantly surprised by its hardiness & blooms. I wound up going back for more & now have them growing in a variety of positions. Some are in wet, sunny spots, others in dry, shaded situations. All seem to be going OK. The plant itself looks a bit like a semi-prostrate Catchfly or Gentian, with big, pink flowers. I believe it may be sometimes called Sweet William & was amongst the bouquet Princess Kate wore to her weddding.

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