Summer White Arenaria

Arenaria montana ‘Summer White’ is Syngenta Flowers’ white-flowered, mounding sandwort (product 70018116). It is sold as a vegetatively propagated perennial with large flowers and mid-spring bloom; the grower profile says flowering does not require vernalization. ## Landscape Use and Seasonal Interest The [Syngenta product profile](https://www.syngentaflowers.com/emea/product/flower/70018116) identifies the exact product, its mounding habit, white/cream flowers, and mid-spring flowering. Syngenta’s [vegetative culture guide](https://www.syngentaflowers.com/ams/sites/g/files/kgtney2381/files/media/document/2023/02/01/culture_perennials_vegetative_arenaria_summer.pdf) gives garden dimensions of 4–6 inches tall by 10–12 inches wide and lists container and landscape use. This low, spreading footprint suits a rock garden, border edge, or container where drainage is reliable. ## Siting and Soil The grower guide recommends full sun and reports that the medium should dry between irrigations. It discusses commercial production conditions, so translate that as a preference for drainage rather than a fixed landscape watering schedule. Species-level RHS guidance describes Arenaria montana as evergreen and suited to poor, freely draining soil. ## Maintenance Water during establishment, then adjust irrigation to rainfall, soil, and heat; avoid waterlogged roots. Syngenta’s guide recommends a production pinch, but that is a grower finishing practice rather than a recurring landscape requirement. No cultivar-specific patent number or grant date was verified. [RHS species guidance](https://www.rhs.org.uk/plants/180984/arenaria-montana-avalanche/details) provides complementary garden care information.