How to Grow Korean Boxwood
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Korean Boxwood
Buxus microphylla var. koreana
shrubKorean Boxwood is a compact, evergreen shrub prized for its fine, dense foliage and ornamental appeal in landscaping. It is hardier than many boxwood varieties and retains its attractive green color even in cold winters. This slow-growing shrub is excellent for hedges, borders, topiary, and container gardens.
When should you plant Korean Boxwood in your zone?
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Example Korean Boxwood timeline · Pittsburgh, PA (Zone 6b)
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Plant Korean Boxwood
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 Korean Boxwood
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Korean Boxwood dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-8; hardy to zone 4 with winter protection
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Establishment
3-6 monthsYoung transplant with small leaves and limited branching; root system developing
Water regularly to keep soil consistently moist; mulch around base; avoid fertilizing year one; provide afternoon shade if planted in spring
Young Growth
1-2 yearsPlant fills out with denser branching; foliage becomes more compact; new leaf growth visible in spring
Maintain consistent moisture; light pruning to shape; mulch to maintain soil temperature; monitor for spider mites in dry conditions
Vegetative Growth
Ongoing (slow growth rate 6-12 inches per year)Established shrub with dense, fine foliage; slow steady growth; mature form taking shape
Prune as needed for shape in early spring or late summer; fertilize lightly in spring with balanced fertilizer; maintain mulch layer
Mature
Indefinite (long-lived shrub, 40+ years)Full-sized shrub with dense, attractive foliage; excellent branching structure; year-round ornamental interest
Maintain regular pruning schedule for shape; water during drought; protect from winter winds and harsh conditions; remove any diseased branches
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity; spray with water; use miticide if severe; ensure consistent watering
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Prune out infested leaves; apply horticultural oil in spring or fall; systemic insecticide before adult emergence
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Prune out affected growth; spray with insecticidal soap; improve air circulation
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Remove infected plant parts immediately; improve air circulation; avoid overhead watering; sanitize tools between cuts
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Dormant oil spray in late winter; prune out heavily infested branches; horticultural oil in growing season
Uses
Ornamental Hedging & Borders
HouseholdKorean Boxwood's compact growth and dense foliage make it ideal for formal hedges, borders, and foundation plantings. Its evergreen nature provides year-round structure and visual interest in landscape design. [source]
Topiary & Pruned Shapes
CraftThe fine foliage and slow growth rate make Korean Boxwood excellent for topiary work, geometric shapes, and ornamental pruning. Its responsive branching allows for intricate shaping over time. [source]
Container & Patio Gardens
HouseholdDwarf varieties are perfect for container planting, adding evergreen structure to patios, balconies, and entryways. Container-grown plants can be brought to sheltered locations in harsh winters. [source]
Wildlife Cover & Shelter
WildlifeThe dense growth provides excellent shelter and nesting habitat for birds and beneficial insects. Year-round foliage offers protective cover during cold months. [source]
Traditional Herbal Use
MedicinalBoxwood has been used in traditional medicine in Asian and European herbalism, though modern use is limited. Historically valued for various preparations in traditional medicine systems. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Korean Boxwood is not harvested for food or material use. For ornamental purposes, prune in early spring (before new growth) or late summer (August-September) to maintain shape. Avoid heavy pruning in late fall as new growth will be damaged by frost. Remove no more than one-third of the plant material annually.
Fun Facts
- 🌱 Korean Boxwood is significantly hardier than its cousin, the English Boxwood, making it suitable for colder climates; it was selected from naturally hardy populations in Korea
- 🌱 Boxwood is one of the slowest-growing ornamental shrubs, adding only 6-12 inches per year, which means well-established boxwood hedges can be over 100 years old
- 🌱 The wood of boxwood is extremely dense and hard, historically prized for carving, making musical instruments, and creating fine decorative objects—though modern harvesting focuses on ornamental rather than timber use
Gardening Terms
New to gardening? Learn about terms used in this guide:
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