| Variety | Size | Features | Best For |
|---|
| English Boxwood (B. sempervirens 'Suffruticosa') | 3 feet | Slow (1"/year); dense; classic | Low hedges, knots, edging |
| American Boxwood (B. sempervirens) | 10-15 feet | Faster; glossy leaves; inconspicuous flowers | Tall hedges, screens, topiary |
| 'Green Velvet' | 3-4 feet | Round; winter hardy; holds color | Hedges, spheres, foundation |
| 'Green Mountain' | 5 feet | Pyramidal; upright; dark green | Specimen, pyramidal topiary |
| 'Green Gem' | 2-3 feet | Compact mound; slow | Low hedge, rock garden |
| 'Variegata' | 5-8 feet | Cream-margined leaves | Accent, brightening shade |
| 'Winter Gem' | 4-6 feet | Korean type; excellent hardiness | Hedges, cold climates |
| 'Franklin's Gem' | 2 feet | Fine texture; slow | Edging, containers |
Planting
- Timing: Spring or fall (avoid summer heat)
- Site: Part shade ideal; tolerates full sun with adequate moisture
- Soil: Well-drained; pH 6.5-7.5; amend with compost
- Spacing: 12-18 inches for hedges; mature width for specimens
- Method: Hole 2× root ball; plant at same level; water thoroughly
Watering
- Establishment: Frequent, deep watering first season
- Established: Weekly deep soak during dry periods
- Critical: Late fall watering prevents winter desiccation
- Caution: Shallow roots rot in soggy soil—avoid overwatering
- Disease: Phytophthora root rot from excess moisture
Mulching
- Depth: 3-4 inches
- Materials: Shredded bark, pine straw, composted leaves
- Timing: Spring and fall renewal
- Placement: Keep 6 inches clear of stems
- Benefits: Moisture retention, temperature moderation, weed suppression
Pruning
When
- Heavy pruning: Late winter/early spring
- Light shaping: After spring growth hardens (June)
- Avoid: Late summer/fall (winter injury)
Techniques
- Thinning (preferred): Remove selective branches to interior; improves air/light
- Shearing: For formal shapes only; creates dense shell, bare interior
- Rejuvenation: Cut to 12-18 inches in late winter (recovers in 2-3 years)
Key Principles
- Never remove more than ⅓ growth annually
- Base wider than top for light penetration
- Remove dead twigs from center (prevent fungal issues)
- Use sharp, clean tools
Common Problems
| Issue | Cause | Solution |
|---|
| Winter bronzing (orange foliage) | Winter sun/wind desiccation | Anti-desiccant spray; burlap screen; fall watering |
| Phytophthora root rot | Poor drainage; overwatering | Improve drainage; reduce water; resistant cultivars |
| Boxwood blight | Fungal disease (Calonectria) | Remove infected; sanitize tools; avoid overhead water |
| Leafminer | Insect larvae in leaves | Systemic insecticide; prune damaged |
| Psyllid | Sap-sucking insects | Horticultural oil; insecticidal soap |
| Spider mites | Hot, dry conditions | Increase humidity; miticide if severe |
Design Uses
- Formal hedges and parterres
- Topiary (globes, cones, spirals, animals)
- Knot gardens
- Foundation plantings
- Walkway and driveway edging
- Container specimens
- Mixed border structure
Pro Tips
- Choose cultivar for mature size—avoids constant shearing
- Thinning cuts healthier than shearing for long-term vigor
- Rotate shearing sides annually to prevent bare zones
- String lines for straight hedges
- Underplant with bulbs for spring color
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