How to Grow Wintergreen Boxwood
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Wintergreen Boxwood
Buxus microphylla var. japonica 'Wintergreen'
shrubWintergreen Boxwood is a compact, evergreen shrub prized for its dense foliage and exceptional cold hardiness. It maintains its vibrant green color through winter, making it an excellent choice for year-round landscape interest and formal hedging. This cultivar is a Japanese boxwood variety known for its superior winter performance compared to standard English boxwoods.
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Example Wintergreen Boxwood timeline · Pittsburgh, PA (Zone 6b)
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Plant Wintergreen 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 Wintergreen Boxwood
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-8, with reliable winter hardiness to zone 4b
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Get my Wintergreen Boxwood timeline →Growth Stages
Establishment
3-6 months after plantingYoung plant focuses on root development with minimal above-ground growth; foliage is light green and tender
Water consistently to establish roots. Apply 2-3 inches of mulch around base, keeping it 2 inches away from stem. Avoid heavy pruning in first year.
Vegetative Growth
6 months to 2 yearsPlant develops dense branching and fills out; foliage becomes thicker and more vibrant; lateral growth accelerates
Maintain consistent moisture. Light pruning to shape is acceptable. Feed in spring with balanced slow-release fertilizer. Monitor for pests and diseases.
Mature Growth
2+ years onwardPlant reaches desired size and form; growth slows significantly; foliage is uniformly dense and deep green year-round
Prune in late spring after new growth hardens off to maintain shape. Reduce watering frequency as drought tolerance increases. Fertilize lightly annually.
Winter Dormancy
November-March, depending on regionPlant slows metabolic processes; foliage may take on slightly purple or bronze tinges in extreme cold but retains color unlike many boxwoods
Reduce watering but do not allow soil to dry completely. Avoid harsh winter winds if possible by providing windbreaks. Do not prune in late fall.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Prune out infested leaves in late summer. Apply neem oil or horticultural oil in spring when adults emerge. Use yellow sticky traps to monitor. Insecticidal soap may help on young infestations.
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Prune and remove affected foliage showing cupped leaves. Spray with insecticidal soap in spring. Encourage natural predators. Severe infestations may require systemic insecticide.
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Increase humidity by misting foliage. Spray forcefully with water to dislodge mites. Apply horticultural oil or miticide if populations are high. Avoid over-fertilizing with nitrogen.
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No cure; prevention is critical. Prune out infected branches immediately and destroy. Sterilize pruning tools between cuts. Improve air circulation. Avoid overhead watering. Remove and destroy severely infected plants. Choose resistant cultivars.
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Prune out heavily infested branches. Spray with dormant oil in late winter. Use horticultural oil in growing season. Insecticidal soap on crawlers. Encourage beneficial insects.
Uses
Formal Hedging & Borders
HouseholdWintergreen Boxwood is exceptionally popular for creating formal hedges, parterre, and structured borders due to its dense growth habit, fine texture, and year-round appearance. Its cold hardiness makes it reliable in regions where traditional English Boxwood fails. [source]
Topiary & Ornamental Shaping
HouseholdThe small leaves and dense branching make Wintergreen Boxwood an excellent choice for topiary, geometric forms, and artistic pruning. It responds well to detailed shaping and maintains structure through the seasons. [source]
Winter Foliage for Arrangements
HouseholdWintergreen Boxwood foliage is valued by florists and gardeners for winter and holiday floral arrangements and wreaths, adding structure and greenery when other fresh plant material is scarce. [source]
Woodworking & Fine Crafts
CraftBoxwood has historically been valued for fine woodcarving, small boxes, and decorative turned objects due to its hard, dense, fine-grained wood. Small cuttings can be harvested for craft projects. [source]
Wildlife Shelter & Nesting Habitat
WildlifeDense boxwood plantings provide excellent shelter, cover, and nesting sites for songbirds, beneficial insects, and small wildlife. The evergreen nature ensures year-round protection. [source]
Harvest Tips
Wintergreen Boxwood is an ornamental shrub and is not harvested for food. Foliage can be pruned for floral arrangements or topiary work from late spring through early summer after new growth has hardened. Avoid heavy pruning after August to prevent tender new growth before winter.
Fun Facts
- 🌱 Wintergreen Boxwood is hardier than the traditional English Boxwood (Buxus sempervirens) and was specifically selected for its superior winter color retention and ability to thrive in colder climates.
- 🌱 Boxwood has been cultivated for ornamental purposes for over 2,000 years and appears in the oldest European garden designs, including the gardens of Versailles and Renaissance Italian villas.
- 🌱 The extremely hard, dense wood of boxwood was historically used to make precision instruments, musical instruments, and fine boxes, which is how the plant got its common name.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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