Juniper Haircap Moss
Polytrichum juniperinum
Also listed as Polytrichum apiculatum, Pogonatum maoriae
Also known as Juniper Haircap, Juniper Polytrichum Moss
Climate Match for your location
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A low-growing moss with distinctive tall hair-like structures on its capsules, forming dense mats on moist forest floors and rocks. It prefers shaded, acidic conditions and is valued in shade gardens and terrariums.
Why grow it
Polytrichum juniperinum establishes denser, more uniform mats than many competing moss species in acidic shade, making it useful for stabilizing bare patches on forest floors or rock gardens. Unlike some mosses that require consistent misting, haircap moss tolerates periodic drying once established, reducing maintenance overhead in shade gardens. Its preference for poor, acidic soils means it performs reliably in conditions where other groundcovers struggle, without competing for nutrients.
Watch out for
This moss spreads slowly compared to vascular groundcovers, so patience is required before coverage becomes substantial. In very wet or poorly draining conditions, it may succumb to liverworts or algal overgrowth; air movement and drainage matter more than you might expect for a moisture-loving moss.
Overview
- Form
- Growth Rate
- Size
- Dormancy
- Family
- Polytrichaceae
Native to the United States
Native Range
Northern temperate regions
Native to: New Jersey, New York
Seasonality
Season of Interest
Ground cover
Low spreading plants that carpet the soil.
Succession Role
Tolerances & Soil
Establishment & Care
- Establishment
- Maintenance
- Propagation
A low-growing moss with distinctive tall hair-like structures on its capsules, forming dense mats on moist forest floors and rocks. It prefers shaded, acidic conditions and is valued in shade gardens and terrariums.
Climate Match for your location
See how well Juniper Haircap Moss grows in your area.
Enter your ZIP code and we'll show you how this plant fits your local climate.
Why grow it
Polytrichum juniperinum establishes denser, more uniform mats than many competing moss species in acidic shade, making it useful for stabilizing bare patches on forest floors or rock gardens. Unlike some mosses that require consistent misting, haircap moss tolerates periodic drying once established, reducing maintenance overhead in shade gardens. Its preference for poor, acidic soils means it performs reliably in conditions where other groundcovers struggle, without competing for nutrients.
Watch out for
This moss spreads slowly compared to vascular groundcovers, so patience is required before coverage becomes substantial. In very wet or poorly draining conditions, it may succumb to liverworts or algal overgrowth; air movement and drainage matter more than you might expect for a moisture-loving moss.
Overview
- Form
- Growth Rate
- Size
- Dormancy
- Family
- Polytrichaceae
Native to the United States
Native Range
Northern temperate regions
Native to: New Jersey, New York
Seasonality
Season of Interest
Ground cover
Low spreading plants that carpet the soil.
Succession Role
Tolerances & Soil
Establishment & Care
- Establishment
- Maintenance
- Propagation
Similar ground covers you might consider:
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