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PlantFiles: Rock Rose, Sun Rose
Helianthemum nummularium

Family: Cistaceae
Genus: Helianthemum (hee-lee-AN-thee-mum) (Info)
Species: nummularium (num-ew-LAH-ree-um) (Info)

3 members have or want this plant for trade.


12-18 in. (30-45 cm)

18-24 in. (45-60 cm)

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)

Sun Exposure:
Full Sun

Unknown - Tell us

Bloom Color:
Bright Yellow
White/Near White

Bloom Time:
Late Spring/Early Summer


Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
Unknown - Tell us

Patent Information:

Propagation Methods:
From seed; direct sow outdoors in fall

Seed Collecting:
Unknown - Tell us

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1 positive
2 neutrals
No negatives

Gardeners' Notes:

Positive Bellisgirl On Mar 7, 2007, Bellisgirl from Spokane, WA wrote:

Ive had this plant for three years now. I have the Annabel variety, which has double blooms. Mine has formed a small six inch mound. It is evergreen. I really love it because it does well in a tough area of my garden where little else will grow.

Neutral pokerboy On Sep 29, 2004, pokerboy from Canberra
Australia (Zone 8b) wrote:

This plant enjoys a well drained soil and a light sheer after flowering to do away with the deadheads. pokerboy.

Neutral Terry On Aug 31, 2001, Terry from Murfreesboro, TN (Zone 7a) wrote:

Rock Roses (Cistaceae family) are sometimes classified as "woody perennials" and other times as "shrublets". They are not long-lived shrubs, and will likely need replacing every 3 years or when they begin to look scraggly.

Contrary to their name, they will not tolerate poor, dry, rocky soil, but will do best in average garden soil (not too rich), with regular water to encourage hard, non-succulent growth. In colder climates, cover the plants with everygreen boughs in the winter to prevent dessication.


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

Hercules, California
Lafayette, California
Farmington, New Mexico
Bend, Oregon
Barto, Pennsylvania
Staunton, Virginia
Pasco, Washington
Spokane, Washington

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