Garden Rockcress is a hardy alpine perennial that transforms rocky slopes and sun-baked spots into cascades of pristine white flowers each spring. Native to limestone crevices and mountain streams, this evergreen spreads into dense mats of toothed gray-green foliage that persist through winter, then erupts with delicate four-petaled blooms in April and May. Hardy in zones 4 through 7, it grows just 6 to 12 inches tall but spreads considerably wider, thriving in gritty, well-drained soil where most plants struggle. Both the tender spring leaves and showy flowers are edible, offering a fresh addition to the gardener's palette while requiring remarkably little water or fuss.
Full Sun
Moderate
4-7
12in H x 18in W
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Moderate
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This alpine evergreen thrives in the lean, rocky soils that defeat other perennials, spreading into a dense mat of gray-green foliage that stays ornamental year-round. Spring brings waves of tiny white flowers perfect for cutting, and the plant's proven deer and drought resistance means it simply keeps delivering beauty with minimal intervention. Cut back after bloom and it responds with denser, bushier growth, rewarding gardeners who give it the simplest of attention.
Garden Rockcress excels in rock gardens, alpine troughs, and the crevices of stone walls where its spreading habit and shallow root system feel at home. The tender leaves and flowers both offer a peppery bite to spring salads, while the abundant blooms make excellent additions to fresh bouquets and arrangements. Its tolerance for poor, rocky soil makes it invaluable for stabilizing and beautifying steep slopes, raised beds, and areas too harsh for fussier perennials.
No timeline data available yet for this variety.
Transplant rosettes or seedlings in spring after the last frost, spacing them 6 to 18 inches apart depending on desired spread. Ensure soil is gritty and well-drained before planting.
Harvest tender young leaves and delicate flowers in spring for use in salads. Pick leaves before the heat of summer arrives, as they become tougher as the season progresses. Gather flowers just as they open to enjoy their crisp, peppery character at their peak.
Cut back foliage after spring bloom finishes to promote a denser, bushier growth habit and prevent the plant from becoming straggly. This simple pruning keeps the mat compact and encourages more vigorous regrowth through the growing season.
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