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How to Grow Creeping Juniper 'Bar Harbor'

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Creeping Juniper 'Bar Harbor'

Juniperus horizontalis 'Bar Harbor'

shrub

A low-growing, mat-forming evergreen conifer that spreads horizontally along the ground, typically reaching only 12-18 inches tall. Known for its feathery, soft blue-green foliage that often turns purple or bronze in winter. Extremely hardy and drought-tolerant, making it ideal for ground covers, rock gardens, and erosion control on slopes.

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Example Creeping Juniper 'Bar Harbor' timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Creeping Juniper 'Bar Harbor'

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Creeping Juniper 'Bar Harbor'

    Late summer into fall

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Creeping Juniper 'Bar Harbor' dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily; performs best in bright light
💧
Water: Very drought-tolerant once established. Water regularly during first growing season to establish roots. Mature plants need minimal supplemental watering except in extreme drought. Avoid overwatering or waterlogged soil, which can cause root rot.
📏
Spacing: 18-24 inches
📅
Days to maturity: Not applicable; matures slowly over 3-5 years to full spread
🌱
Planting depth: Plant at same depth as root ball; do not bury above crown

Soil

Type: Well-draining sandy or gravelly soil; tolerates poor soil conditions
pH: 6.0-7.5
Amendments:
Coarse sand or gravel for drainage Perlite to improve aeration

Growing Zones

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Exceptionally cold-hardy; thrives in zones 2-7

2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a

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Growth Stages

1

Establishment

First year

Young plant with compact form, feathery foliage beginning to spread horizontally

Water weekly during first growing season. Mulch around base to retain moisture. Protect from harsh winter winds if planted in exposed locations.

2

Spreading

Years 2-3

Plant gradually expands outward, developing more dense branching and spreading mat

Reduce watering frequency as root system develops. Minimal fertilization needed. Remove any upright growth to maintain horizontal form.

3

Mature Growth

Year 3 onward

Dense, low-growing mat with fine-textured foliage fully covering ground area

Drought-tolerant at this stage. Prune lightly if needed to maintain shape or remove damaged branches. No fertilizer necessary.

4

Winter Dormancy

Late fall through early spring

Foliage color changes from blue-green to purple or bronze hues in cold temperatures

Color change is normal and protective. No special care needed. Very cold-hardy.

Companion Planting

Plan your garden →

Plant with:

Sedum species Creeping phlox Lamb's ear Russian sage Catmint Sempervivum Rock cress

Avoid planting near:

Plants requiring frequent watering Dense shade-casting trees High-moisture-loving groundcovers

Common Pests

  • Increase humidity with occasional misting; spray with insecticidal soap or neem oil if severe

  • Prune out heavily infested branches; apply horticultural oil in late winter or early spring

  • Ensure excellent drainage; reduce watering frequency; improve soil aeration

  • Prune out affected branches; improve air circulation; avoid overhead watering

Uses

🏠

Erosion control and slope stabilization

Household

The dense root system and spreading growth habit make 'Bar Harbor' excellent for stabilizing slopes and controlling erosion on hillsides and embankments. [source]

🦋

Wildlife habitat and shelter

Wildlife

Dense foliage provides shelter and nesting habitat for small birds and wildlife. The evergreen nature offers year-round cover. [source]

🎨

Landscape design and ornament

Craft

Attractive blue-green foliage with winter color changes makes it valuable for rock gardens, alpine gardens, and modern landscape designs. Used as living mulch and foreground plantings. [source]

🍳

Culinary juniper flavoring

Culinary

Juniper species produce berry-like cones used to flavor gin and culinary dishes. However, 'Bar Harbor' is primarily ornamental; the cones are small and not typically harvested for this use. [source]

Harvest Tips

Not harvested for consumption. Prune selectively in spring to maintain shape or remove dead/damaged branches. Cut back any upright growth to maintain horizontal form. Avoid heavy pruning, as recovery is slow.

Fun Facts

  • 🌱 'Bar Harbor' is named after Bar Harbor, Maine, and was selected specifically for its extreme cold hardiness and ability to thrive in harsh coastal conditions.
  • 🌱 This cultivar's winter color change from blue-green to purple or bronze is a natural protective mechanism that increases anthocyanin production to help the plant survive freezing temperatures.
  • 🌱 Creeping Juniper 'Bar Harbor' can spread 4-6 feet wide over time, making a single plant capable of covering significant ground area with minimal maintenance.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Full Sun Mulch
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