‘Irish Moss’ – Ground Cover

Sagina subulata var. glabrata ‘Aurea’, commonly known as Irish Moss or Heath Pearlwort, is a highly popular evergreen ground cover plant. Loved for its compact, moss-like appearance and bright lime-green foliage, it’s ideal for planting in rock gardens, between pavers, or as a lawn alternative in lightly trafficked areas. In spring, it produces delicate white flowers, adding seasonal charm to its vibrant year-round foliage.

Overview

This low-growing perennial forms a dense, mossy mat and will gradually mound up to a few centimetres tall. Commonly called Golden Irish Moss, for the foliage colour, t’s perfect for filling spaces between stepping stones or softening hard landscaping features, especially where foot traffic is minimal.

It grows like a moss and will form a little mound over time reaching a few cms tall. Excellent between and around pavers where traffic is light.

Care

Sagina subulata ‘Aurea’ is a relatively hardy and low-maintenance plant once established. It tolerates light drought conditions but thrives best with consistent moisture and protection from the harsh afternoon sun, especially in warmer climate zones. During midsummer, it may look a bit untidy, but it typically recovers well in autumn.

• Areas where dogs roam free.
• Not the best in deep shade.

How to Grow Sagina subulata glabrata aurea

Best when used in a rock garden, crevice garden or between pavers/stepping stones in a part shaded position

Growing Conditions for Sagina glabra aurea

• Soil:
  Best grown in a humus rich well drained soil that retains some moisture.
  
• Watering:
  Moisture is required, water regularly during dry periods, do not allow the soil to dry completely.
  
• Sun/Light:
  Best grown in dappled shade to full but not deep shade. Exposure to full sun especially afternoon sun will quickly scorch the foliage.
  
• Fertilizer:
  A general purplose organic fertiliser in spring should be sufficient in good soils. A little liquid fertiliser in spring can also be beneficial.
  
• Temperature:
  Cool climates to temperate climate zones work best. Heavy frosts and freezes are not suitable, hot dry climates are also not suitable.
  Hardy in USDA zones 4-8.
  Can tolerate cooler temperatures but may struggle in hot climates.
  
• Flowers:
  Tiny, white flowers appear from late spring to early summer, however it is the golden green foliage that is the highlight of the plant.
  
• Height and Width:
  Low growing to a height of 1-2 inches (2.5-5 cm).
  Forms a dense, spreading mat withWill spread to around 30cm over time.
  
• Origin:
  Native to Europe and Asia

Propagation

It can be propagated by division of established clumps.

Use Sagina subulata ‘Aurea’ as a shade-loving ground cover in:

• Rock gardens
• Between paving stones
• Crevice gardens
• Shaded garden borders

Attributes and Details

• Botanical Name Sagina subulata var. glabrata ‘aurea’
• Common Names Irish Moss, Heath Pearlwort
• Plant Type Evergreen perennial ground cover
• Growth Habit Low-growing, spreading mat-forming plant
• Height 1–2 inches (2.5–5 cm)
• Width Spreads up to 30 cm over time
• Time to Ultimate Height 1–2 years under ideal conditions
• Light Dappled shade to part shade; avoid harsh afternoon sun
• Climate Zone Cool to Temperate Zone such as USDA Zones 4–8.
• Plant Usage Ground cover, between pavers, rock gardens, crevice gardens, containers
• Plant Environment Outdoor; protected, partially shaded garden areas
• Frost Tolerance Moderate; tolerates light frost but not heavy freezes
• Drought Tolerance Moderate once established; not fully drought-tolerant
• Special Features Moss-like texture, evergreen, ornamental foliage, white spring flowers
• Soil Type Humus-rich, well-drained soil with moisture retention
• Soil Moisture Keep evenly moist; do not allow to dry out completely
• pH Level Neutral to slightly acidic (around 6.0–7.0)
• Attracts Wildlife Not particularly known for attracting wildlife
• Flower Colour Small white flowers
• Flowering Time Late spring to early summer
• Foliage Type Evergreen
• Foliage Colour Lime green to golden green
• Autumn / Fall Colour Foliage colour remains evergreen; no notable change
• Lifespan Perennial; long-lived in suitable conditions

Sagina subulata or ‘Irish Moss’ is readily available from the following participating nurseries.

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