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Saxifraga umbrosa

Family: Saxifragaceae (saks-ih-frag-AY-see-ee) (Info)
Genus: Saxifraga (saks-if-FRAG-uh) (Info)
Species: umbrosa (um-BRO-suh) (Info)

Synonym:Saxifraga x geum

10 members have or want this plant for trade.

Alpines and Rock Gardens

6-12 in. (15-30 cm)

12-15 in. (30-38 cm)

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)

Sun Exposure:
Light Shade
Partial to Full Shade

Unknown - Tell us

Bloom Color:
White/Near White

Bloom Time:
Mid Spring
Late Spring/Early Summer


Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

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By Baa
Thumbnail #1 of Saxifraga umbrosa by Baa

By Baa
Thumbnail #2 of Saxifraga umbrosa by Baa

By PrattlingParne
Thumbnail #3 of Saxifraga umbrosa by PrattlingParne

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Thumbnail #6 of Saxifraga umbrosa by Leehallfae


1 positive
1 neutral
No negatives

Gardeners' Notes:

Positive parable5555 On Jul 15, 2005, parable5555 from Marblehead, MA wrote:

This plant has been perfectly hardy for me in zone 5b for 15 years at least.Marblehead Ma , in many properties Suffers in drought years, but always returns generously
Can you suggest who may have closely related saxes to buy and trial.........
I would like to trial more of the thick leaved sorts and they are hard to find in the us. I also have the variegated y/g form which is very happy 12 yrs or more
Ellen Cool / ldscp dsr

Neutral Baa On Apr 22, 2004, Baa wrote:

Native of Europe and widely naturalised.

Has fleshy, mid-green leaves with scalloped edges. Bears small, white, star shaped flowers with little red spots and stamens, borne on reddish, leafless stems.

Flowers between April and June

Likes a moist but well drained soil in shade, will cope with some sun in cool climates.

This one is often mistaken with S. x urbium.


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

Stockton, California
Port Orford, Oregon
Portland, Oregon
Pittsburgh, Pennsylvania
Kalama, Washington
North Bend, Washington
Seattle, Washington

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