Saxifraga Species, Robertsoniana Saxifrage, St. Patrick's Cabbage

Saxifragaspathularis

Family
Saxifragaceae (saks-ih-frag-AY-see-ee)
Genus
Saxifraga (saks-if-FRAG-uh)
Synonym
Sun Exposure
Light Shade
Partial to Full Shade
Full Shade
Foliage
Evergreen
Height
under 6 in. (15 cm)
6-12 in. (15-30 cm)
12-18 in. (30-45 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)
Bloom Color
White/Near White
Bloom Time
Late Spring/Early Summer
Other Details
Category
Groundcovers
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Dark/Black
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
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 seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
Plant is viviparous
Seed Collecting
Allow seedheads to dry on plants; remove and collect seeds
Regional

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Gardener's Notes:

1
positive
0
neutral
0
negative
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St. John's, NL (Zone 5b) | December 2004 | positive

This species is one of the parents of the very popular 'London Pride' saxifrage. It is native to N. Portugal, NW Spain and S. Ireland. ...Read More

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