Phlox subulata 'Emerald Cushion Blue' is a stunning low-growing alpine perennial, widely valued for its ability to form dense, spreading cushions of evergreen foliage that become smothered in a profusion of soft lavender-blue flowers each spring. This reliable and hardy variety is perfect for adding colour and texture to rockeries, alpine beds, border edges, dry walls, and containers. Once established, it requires very little maintenance and provides excellent ground cover throughout the year.

This listing includes 3 or 6 established plants, each supplied in a 1 litre root ball, ready to plant out and establish quickly in your garden.

Key Features:

• Masses of delicate lavender-blue flowers in spring


• Low-growing, mat-forming habit – ideal as ground cover


• Evergreen, needle-like foliage provides year-round interest


• Hardy perennial – fully frost hardy in UK gardens


• Drought tolerant once established


• Excellent for rockeries, alpine beds, walls, path edges, and containers


• Attracts bees, butterflies, and other pollinators


• Low maintenance – minimal pruning required

Planting and Care:

Plant in a well-drained position in full sun for the best flowering display. Phlox subulata thrives in poor to moderately fertile, well-drained soil and is well suited to sandy or gritty conditions. Avoid waterlogged or heavy clay soils. After flowering, a light trim helps maintain a compact, tidy shape and encourages fresh new growth. Water regularly during the first growing season to help plants establish, after which they are generally drought tolerant.

Cultural Information:

• Botanical Name: Phlox subulata 'Emerald Cushion Blue'


• Common Names: Moss Phlox, Creeping Phlox, Alpine Phlox


• Classification: Hardy Evergreen Perennial


• Fully Grown Height & Spread: 10–15 cm × 30–45 cm


• Growth Habit: Low-Growing, Mat-Forming, Cushion-Shaped


• Perfect for: Rockeries, Alpine Gardens, Border Edges, Dry Walls, Containers, Ground Cover


• Flowering Time: Spring (April–May)


• Flower Colour: Soft Lavender-Blue


• Planting Position: Full Sun


• Soil Type: Well-Drained, Poor to Moderately Fertile (Sandy or Gritty Ideal)


• Attracts: Bees, Butterflies & Pollinators


• Type: Hardy Evergreen Perennial


• Foliage: Needle-Like, Dense, Dark Green – Evergreen


• Hardiness: Fully Hardy (RHS H5)

What's Included:

• 3 x Phlox subulata 'Emerald Cushion Blue' plants


• Each supplied in a 1 litre root ball

Notes: This variety features beautiful lavender-blue flowers set against rich emerald-green evergreen foliage, providing colour and interest throughout the seasons.