Plant Library

Other Names:  Blue Cascade Rock Cress

Group/Class:  Cascade Series

Description:

This stunning alpine variety produces beautiful cascades of dainty violet-blue flowers in springtime; for the rest of the season it is an attractive dense green mat adding tremendous interest to rock gardens or retaining walls

Ornamental Features

Cascade Blue Rock Cress is smothered in stunning violet cup-shaped flowers with blue overtones and yellow eyes at the ends of the stems from mid to late spring. Its small round leaves remain green in colour throughout the year.

Landscape Attributes

Cascade Blue 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.

Cascade Blue Rock Cress is recommended for the following landscape applications;

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

Planting & Growing

Cascade Blue Rock Cress will grow to be only 6 inches tall at maturity, with a spread of 24 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. As an evegreen perennial, this plant will typically keep its form and foliage year-round.

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 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.

Cascade Blue 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.