Winter White Arenaria

Winter White is a compact, mounding selection of mountain sandwort, grown for a low cushion of foliage and a dense display of white flowers in spring. Its small scale suits rock gardens, container edges, crevices and the front of a sunny, freely draining border ([RHS](https://www.rhs.org.uk/plants/27019/arenaria-montana/details)). ## Garden use and growing conditions Syngenta lists a 4–6 inch garden height and 10–12 inch width, with flowering from early through late spring; those cultivar-specific dimensions match the recorded size ([Syngenta Flowers](https://www.syngentaflowers.com/ams/product/flower/70064285)). The breeder describes it as suitable for smaller containers and notes its low chilling requirement for production ([Syngenta Flowers](https://www.syngentaflowers.com/ams/product/flower/70064285)). General mountain sandwort guidance from the RHS recommends full sun or partial shade and poor, sandy soil; the species profile also lists rock gardens, paving crevices, containers, edging and ground cover ([RHS](https://www.rhs.org.uk/plants/27019/arenaria-montana/details)). Give it sharp drainage, especially where winter soil stays wet. ## Seasonal interest The white flowers provide the main show in spring above a low green mat ([Syngenta Flowers](https://www.syngentaflowers.com/ams/product/flower/70064285)). Plant it in a pocket or along an edge where the flower carpet can be seen without taller neighbors covering it. Its low, mounding form also pairs well with other compact early-spring perennials. ## Maintenance The RHS notes that mountain sandwort needs no pruning ([RHS](https://www.rhs.org.uk/plants/27019/arenaria-montana/details)). Keep the planting area open enough for air movement and avoid persistently waterlogged soil; divide or replant only if the cushion outgrows its space.