Mountain Sandwort 'Avalanche' (Arenaria montana 'Avalanche'): White Floral Cascade for Rock Gardens

'Avalanche' is a superior cultivar of mountain sandwort that forms a dense, evergreen cushion smothered in pure white, five-petaled flowers in spring. It cascades beautifully over rocks and walls.

Botanical Profile

• Family: Caryophyllaceae
• Genus: Arenaria
• Species: montana
• Cultivar: 'Avalanche'

Features

Forms a tight mat 4–6 inches tall, spreading 12–18 inches. Leaves are small, linear, dark green. Flowers are ½–¾ inch, white, covering the plant in spring. Evergreen.

Culture

Full sun to part shade. Gritty, well-drained soil. Hardy in USDA zones 3–8. Shear after flowering.

Uses

Rock gardens, walls, troughs, alpine gardens, edging.