How to Grow Trailing Juniper
Wikimedia Commons
Trailing Juniper
Juniperus horizontalis
shrubTrailing juniper is a low-growing, spreading evergreen conifer that hugs the ground, typically reaching 12-24 inches tall with a spread of 4-6 feet. It produces fine, scale-like foliage in colors ranging from blue-green to gray-green, often with purple or bronze tinges in winter. This hardy native plant is ideal for ground cover, rock gardens, and erosion control on slopes.
Looking for a specific variety?
When should you plant Trailing Juniper in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Trailing Juniper timeline · Pittsburgh, PA (Zone 6b)
-
Plant Trailing Juniper
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Trailing Juniper
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Trailing Juniper dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 2-9; exceptionally cold-hardy and drought-tolerant
Sign up free to see if Trailing Juniper grows in your zone — and get a personalized planting timeline.
Get my Trailing Juniper timeline →Growth Stages
Establishment
First year after plantingYoung plants develop root system and begin spreading horizontally; foliage is bright green
Water regularly during first growing season; apply 2-3 inches of mulch around base, keeping it away from stem. Stake if necessary to encourage horizontal spread.
Vegetative Growth
Year 2-3Plant actively spreads outward; new feathery growth emerges from stem tips; foliage deepens in color
Water only during dry spells. Prune lightly to encourage bushier, more compact growth if desired. Remove any upright-growing shoots to maintain trailing habit.
Maturation
Year 3-5 onwardPlant reaches full spread and density; forms a dense mat of fine foliage; winter coloration develops (blues, purples, bronzes depending on variety)
Minimal pruning needed; remove any dead wood. No fertilizer required. Ensure good drainage.
Full Cover
Year 5 onward (indefinite)Mature plant completely covers intended area; foliage is dense and fine-textured; wildlife benefit evident
Maintenance pruning only. Once established, requires no supplemental watering in most climates. Monitor for scale insects or spider mites in very hot, dry conditions.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Spray with water to dislodge; apply horticultural oil in severe cases; ensure adequate moisture in hot, dry weather
-
Prune out heavily infested branches; spray horticultural oil in early spring before new growth; monitor regularly
-
Prevent through excellent drainage; avoid overwatering; remove affected plants; amend soil with sand and gravel
-
Hand-pick bags in late fall or winter; spray Bacillus thuringiensis (Bt) in early summer when caterpillars are young
Uses
Ground Cover & Erosion Control
HouseholdTrailing juniper's spreading habit and strong root system make it excellent for stabilizing slopes, covering bare ground, and reducing maintenance in landscapes. Its density prevents weed growth. [source]
Low-Maintenance Landscaping
HouseholdOnce established, requires no watering, fertilizing, or frequent pruning, making it ideal for water-wise, drought-resistant gardens and xeriscape designs. [source]
Juniper Berries for Flavoring
CulinaryMature plants produce bluish fleshy cones (juniper berries) used to flavor gin, spirits, and savory dishes like game and sauerkraut. Berries take 2-3 years to develop. [source]
Wildlife Habitat & Food Source
WildlifeProvides shelter and nesting sites for birds and small mammals. Mature plants attract wildlife seeking cover and food, supporting local ecosystems. [source]
Aesthetic Winter Interest
HouseholdMany cultivars display striking color changes in cold weather, turning purple, bronze, or gray-blue, providing ornamental interest during dormant seasons. [source]
Harvest Tips
Not harvested; grown as an ornamental shrub. However, juniper berries (the fleshy cones) can be collected from mature plants in fall for culinary use—allow 2-3 years before plants produce viable berries.
Fun Facts
- 🌱 Trailing juniper is native to North America and has been used by Native Americans for ceremonial smudging and medicinal purposes for centuries.
- 🌱 Despite its common name 'juniper berry,' the fleshy cone is botanically not a berry but a modified cone structure; it takes 2-3 years to mature and develop its characteristic blue bloom.
- 🌱 Trailing juniper is one of the most cold-hardy and drought-tolerant ground covers available, surviving in USDA zone 2 where temperatures can plummet to -50°F (-45°C).
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Trailing Juniper planting timeline
Tell us your zip code and we'll calculate exactly when to start Trailing Juniper seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Trailing Juniper timeline →