How to Grow Blue Chip
Wikimedia Commons
Blue Chip
Juniperus horizontalis 'Blue Chip'
shrubBlue Chip is a compact, low-growing juniper cultivar prized for its silvery-blue foliage and dense, spreading habit. This evergreen groundcover typically reaches 12-18 inches tall and spreads 3-4 feet wide, making it ideal for erosion control and landscape design. It offers year-round color and requires minimal maintenance once established.
When should you plant Blue Chip in your zone?
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Example Blue Chip timeline · Pittsburgh, PA (Zone 6b)
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Plant Blue Chip
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Blue Chip
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Blue Chip dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in USDA zones 3-9; excellent cold hardiness and heat tolerance
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Establishment
3-6 monthsYoung plants are small and compact with developing root systems; blue foliage is present but may appear less vibrant
Water consistently (weekly) during first season. Mulch lightly to retain moisture and regulate soil temperature. Avoid fertilizing; junipers prefer lean conditions.
Vegetative Growth
6-24 monthsPlant develops lateral branches and spreads outward; foliage deepens in color and becomes denser
Reduce watering frequency as root system matures. Prune selectively only to control shape or remove dead branches. Monitor for pests.
Mature Groundcover
Year 2 onwardReaches full spread (3-4 feet wide) with dense, silvery-blue foliage forming a low carpet; some tiny berry-like cones may appear
Water only during extended drought. No fertilizer needed. Minimal pruning required; let it grow naturally.
Winter Dormancy
3-4 months (winter)Foliage may take on purplish or bronze tones in cold climates; plant slows growth
No supplemental watering needed. Ensure good drainage to prevent ice damage. Avoid heavy snow loading if possible.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with horticultural oil in early spring or dormant oil in winter; prune heavily infested branches; maintain plant vigor
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Spray with water to dislodge; use miticide if severe; ensure adequate air circulation
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Hand-pick bags in winter; spray with Bt (Bacillus thuringiensis) in early summer when larvae are active
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Prune out diseased tips; improve air circulation; avoid overhead watering; fungicide spray if severe
Uses
Groundcover and erosion control
LandscapeBlue Chip's spreading habit, dense foliage, and drought tolerance make it ideal for slopes, bank stabilization, and areas prone to erosion. It suppresses weeds and requires minimal maintenance once established. [source]
Rock gardens and xeriscape design
LandscapePerfect for water-wise landscaping and rock gardens where silvery-blue color provides year-round visual interest with minimal water input. Complements stones and gravel aesthetically. [source]
Wildlife habitat
WildlifeProvides shelter and nesting habitat for small birds and beneficial insects. The dense foliage offers protection from predators and weather extremes. [source]
Color and texture contrast
LandscapeThe silvery-blue foliage adds striking color contrast to mixed perennial borders and landscape compositions. The fine, feathery texture complements coarser foliage plants. [source]
Low-maintenance edging and borders
HouseholdWorks well as a low edging along paths, driveways, and garden borders without requiring frequent pruning or shaping. Neat appearance naturally maintained. [source]
Harvest Tips
Blue Chip is an ornamental groundcover; 'harvesting' consists of pruning for shape control. Remove dead or diseased foliage as needed. Best to prune in late winter or early spring before new growth. Light shearing can maintain a tidy appearance, though natural spreading habit is usually preferred.
Fun Facts
- 🌱 Blue Chip earned its name from its distinctive silvery-blue foliage, which contains needle-like leaves typical of junipers; the color becomes even more pronounced in full sun and during cold winters.
- 🌱 Juniperus horizontalis is native to North America and was traditionally used by Native Americans for various purposes; it's one of the hardiest and most adaptable groundcover junipers available.
- 🌱 Blue Chip is extremely drought-tolerant once established because junipers store water in their foliage and have deeply penetrating root systems; it can thrive in hot, arid climates with minimal supplemental watering.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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