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perennial

Whitewell Gem Rock Cress

Aubrieta deltoidea 'Whitewell Gem'

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Whitewell Gem Rock Cress (Aubrieta deltoidea 'Whitewell Gem') at America's Best Flowers

Whitewell Gem Rock Cress flowers

Whitewell Gem Rock Cress flowers

(Photo courtesy of NetPS Plant Finder)

Height:  6 inches

Spread:  18 inches

Sunlight:  full sun  partial shade 

Hardiness Zone:  4a

Other Names:  False Rock Cress

Ornamental Features

Whitewell Gem Rock Cress is smothered in stunning purple cup-shaped flowers at the ends of the stems from mid to late spring. Its small tomentose round leaves remain grayish green in color throughout the year. The fruit is not ornamentally significant.

Landscape Attributes

Whitewell Gem Rock Cress is a dense herbaceous evergreen perennial with a ground-hugging habit of growth. Its relatively fine texture sets it apart from other garden plants with less refined foliage.

This is a relatively low maintenance plant, 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.

Whitewell Gem Rock Cress is recommended for the following landscape applications;

  • Rock/Alpine Gardens
  • Border Edging
  • Groundcover
  • Container Planting

Planting & Growing

Whitewell Gem Rock Cress will grow to be only 6 inches tall at maturity, with a spread of 18 inches. Its foliage tends to remain low and dense right to the ground. It grows at a slow rate, and under ideal conditions can be expected to live for approximately 10 years.

This plant does best in full sun to partial shade. It prefers to grow in average to moist conditions, and shouldn't be allowed to dry out. It is not particular as to soil type, but has a definite preference for alkaline soils. It is somewhat tolerant of urban pollution. Consider applying a thick mulch around the root zone over the growing season to conserve soil moisture. This is a selected variety of a species not originally from North America. 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.

Whitewell Gem Rock Cress is a fine choice for the garden, but it is also a good selection for planting in outdoor pots and containers. Because of its spreading habit of growth, it is ideally suited for use as a 'spiller' in the 'spiller-thriller-filler' container combination; plant it near the edges where it can spill gracefully over the pot. Note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden. Be aware that in our climate, most plants cannot be expected to survive the winter if left in containers outdoors, and this plant is no exception. Contact our store for more information on how to protect it over the winter months.

 
 
Hardiness Zone Plant Height Minimum Sunlight Soil pH Preference
Characteristics
Rock  Edging  Groundcover  Container 
Applications
Flowers  Texture  Attracts Wildlife 
Ornamental Features
 

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