Aubrieta deltoidea
Blue Cushion
Common names: Purple Cushion
Photo: Stan Shebs · CC BY-SA 3.0 · Source
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Description
The Blue Cushion (Aubrieta deltoidea) is a low mat-forming shrub that produces dense violet to purple flower carpets from April to May. It spreads flat and closes quickly, making it ideal for wall crowns, rock gardens, and along stream banks. Its evergreen, gray-green foliage keeps the mat attractive outside of flowering season. Cultivars such as "Royal Violet" and "Doctor Mules" provide strong color accents and are well suited for dry walls and container edges.
Care instructions
Blue Cushion prefers full sun, warm conditions, and a well-drained, somewhat sparse soil; it tends to rot on heavy, waterlogged soils. Water only when the soil remains dry for an extended period, as excess moisture is more harmful than drought. After flowering, cut the plant back to about half its height to keep it compact and encourage dense blooming the following year. Divide larger mats every few years in early autumn to prevent central dieback. In most locations, Blue Cushion does not require winter protection, but a light mulch of straw can help in highly exposed rock gardens.
Soil & site
Soil pH
Soil type
well-drained, lime-loving, lean, dry
Feeding
Light feeder
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