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Sagina subulata 'Irish Moss'

Irish Moss Pearlwort

Irish Moss creates a close carpet of fine, deep green foliage, with tiny white flowers scattered across it in spring and summer. Although it resembles moss, it is a flowering perennial whose slender stems root as they spread.

The low growth fits between stepping stones, around rocks and in shallow containers. It tolerates occasional footsteps, making it useful along lightly used paths where a small-scale groundcover is wanted.

Provide cool, evenly moist conditions with good drainage. Sun is suitable in cool locations; some midday shade helps in warmer settings. Both prolonged dryness and waterlogged soil can damage the planting.

Size
• Height: 1–2 in
• Width: 3–12 in

Hardiness
• USDA Zones: 4a–8b

Best Uses
• Ground Cover
• Rock Garden
• Container

Plant type
Groundcover, Perennial
Height
1-2 in
Width
3-12 in
Hardiness zones
4a–8b
Sunlight
Full sun to part shade
Growth rate
Moderate
Bloom time
Spring, Summer
Flower color
White
Leaf color
Dark Green
Fall color
Green
Soil
Moist well-drained, Slightly Acidic
Landscape use
Container, Ground Cover, Rock Garden
Shape
Dense, Low Spreading, Mat forming
Fruit
Yes
Fragrant
Yes
Deer resistant
No
Salt tolerant
No
Drought tolerant
No