Silver-leaved Mugwort
Western Mugwort 'Silver Frost' is a North American native perennial that brings ethereal silver foliage to dry, challenging garden spots where many plants simply won't survive. This spreading, rhizomatous herb from the Asteraceae family grows 12, 18 inches tall and wide, thriving in hardiness zones 5, 9 with remarkable drought tolerance and deer resistance. Its insignificant flowers in late summer are less about visual drama and more about the plant's role as a resilient, architectural workhorse for xeriscaping and prairie gardens.
Full Sun
Moderate
5-9
18in H x 18in W
Perennial
Moderate
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What makes 'Silver Frost' special is its ability to turn poor, dry soil into an asset rather than a limitation. This cultivar's silvery foliage creates striking textural contrast in mixed plantings, while its deep rhizomatous root system anchors erosion-prone slopes and handles summer drought without complaint. Unlike its taller, sometimes unruly wild cousins, it maintains a compact mound that won't sprawl or flop in average garden conditions. For gardeners in hot, dry climates or those managing difficult soils, this is the mugwort that actually performs.
Western Mugwort is grown primarily as an ornamental herb valued for its striking silver foliage and architectural form in garden design. The dried flower stems and foliage are traditionally used in herbalism and cultural practices across North America, where the plant has long held significance in indigenous and folk traditions. In contemporary gardens, it serves as a landscape plant for xeriscaping, prairie restoration, and mixed border plantings where its silver tones and textural interest shine alongside drought-tolerant perennials.
Pinching back stems in late spring helps reduce summer stem lodging and encourages a more compact, bushy form. Beyond this spring pinch, minimal pruning is needed unless you want to control spread or remove declining foliage after humid summers. Remove any dead or damaged growth in early spring as new growth emerges.
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“Artemisia ludoviciana ranges across North America from Canada to Mexico, where it has grown on rocky prairies, glades, bluff escarpments, and along roadsides for millennia. The species earned the common name 'white sage' for its distinctly pale, silvery foliage, a trait that early gardeners and collectors recognized and selected for. The 'Silver Frost' cultivar represents deliberate selection within this native lineage, bred to emphasize the compact, ornamental silver foliage that makes it more suitable for cultivated gardens than its taller, more aggressive wild relatives.”