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Hartswood Ruby Rock Rose

Helianthemum 'Hartswood Ruby'

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Hartswood Ruby Rock Rose (Helianthemum 'Hartswood Ruby') at Ashcombe Farm & Greenhouses

Helianthemum 'Hartswood Ruby' flowers

Helianthemum 'Hartswood Ruby' flowers

(Photo courtesy of NetPS Plant Finder)

Height:  15 inches

Spacing:  18 inches

Sunlight:  full sun 

Hardiness Zone:  5b

Other Names:  Rock Rose, Sun Rose

Description:

Lovely ruby-red, saucer shaped flowers on a low growing mound; makes a great rock garden plant or groundcover in full sun areas; lightly shear after blooming; must have good drainage

Ornamental Features

Hartswood Ruby Rock Rose is covered in stunning ruby-red cup-shaped flowers with gold eyes at the ends of the stems from mid spring to mid summer. Its narrow leaves remain light green in color throughout the year. The fruit is not ornamentally significant.

Landscape Attributes

Hartswood Ruby Rock Rose is an herbaceous evergreen perennial with a mounded form. Its relatively fine texture sets it apart from other garden plants with less refined foliage.

This plant will require occasional maintenance and upkeep, and should only be pruned after flowering to avoid removing any of the current season's flowers. It is a good choice for attracting butterflies to your yard. It has no significant negative characteristics.

Hartswood Ruby Rock Rose is recommended for the following landscape applications;

  • Mass Planting
  • Rock/Alpine Gardens
  • Border Edging
  • General Garden Use
  • Container Planting

Planting & Growing

Hartswood Ruby Rock Rose will grow to be about 12 inches tall at maturity, with a spread of 24 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 18 inches apart. Its foliage tends to remain dense right to the ground, not requiring facer plants in front. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 7 years.

This plant should only be grown in full sunlight. It is very adaptable to both dry and moist growing conditions, but will not tolerate any standing water. It is not particular as to soil pH, but grows best in poor soils. It is somewhat tolerant of urban pollution. This particular variety is an interspecific hybrid. It can be propagated by division; however, as a cultivated variety, be aware that it may be subject to certain restrictions or prohibitions on propagation.

Hartswood Ruby Rock Rose is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. It is often used as a 'filler' in the 'spiller-thriller-filler' container combination, providing a mass of flowers against which the thriller plants stand out. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.

 
 
Hardiness Zone Plant Height Minimum Sunlight
Characteristics
Massing  Rock  Edging  Garden  Container 
Applications
Flowers  Texture  Attracts Wildlife 
Ornamental Features