Saxifraga Species, Encrusted Saxifrage, Silver Saxifrage

Saxifragahostii

Family
Saxifragaceae (saks-ih-frag-AY-see-ee)
Genus
Saxifraga (saks-if-FRAG-uh)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Grown for foliage
Evergreen
Smooth
Height
under 6 in. (15 cm)
6-12 in. (15-30 cm)
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
Spacing
15-18 in. (38-45 cm)
Hardiness
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)
Bloom Color
White/Near White
Bloom Time
Late Spring/Early Summer
Other Details
Category
Alpines and Rock Gardens
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Bronze
Where to Grow
Can be grown as an annual
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)
Patent Information
Propagation Methods
By dividing the rootball
From herbaceous stem 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
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Regional

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

Lakeville, Minnesota

Camano Island, Washington

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Gardener's Notes:

1
positive
1
neutral
0
negative
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C
Spokane, WA | May 2022 | neutral

Exposure recommended includes "full sun".
I live in the cloudy, rainy Pacific Northwest where I planted this in "full sun". It was...Read More

T
St. John's, NL (Zone 5b) | December 2004 | positive

Saxifraga hostii appears much like a larger version of S. paniculata, but it is not quite a silvery in colour. The rosettes are grey-gre...Read More

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