Helianthemum, Common Rock Rose, Sun Rose 'St. Mary's'

Helianthemumnummularium

Genus
Helianthemum (hee-lee-AN-thee-mum)
Species
nummularium (num-ew-LAH-ree-um)
Synonym
Sun Exposure
Full Sun
Sun to Partial Shade
Foliage
Evergreen
Height
6-12 in. (15-30 cm)
Spacing
36-48 in. (90-120 cm)
Hardiness
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)
Bloom Color
White/Near White
Bloom Time
Mid Spring
Late Spring/Early Summer
Other Details
Category
Groundcovers
Water Requirements
Drought-tolerant; suitable for xeriscaping
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
Patent Information
Propagation Methods
Seed Collecting
Regional

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

Grand Junction, Colorado

Bend, Oregon

Salt Lake City, Utah

Vancouver, Washington

Featured Videos

Gardener's Notes:

0
positive
1
neutral
0
negative
Sort By:
Sort By:
S
Oklahoma City, OK (Zone 7a) | May 2004 | neutral

This cultivar is noted for its dark green foliage and pure white flowers with with small yellow stamens at the center. Plant in a locatio...Read More

Featured
Kentucky Flat Millipede
(Apheloria virginiensis)
Sooty Oystercatcher
(Haematopus fuliginosus)
Featured
Kentucky Flat Millipede
(Apheloria virginiensis)
Sooty Oystercatcher
(Haematopus fuliginosus)