Boxwood vs Privet: Pick the Right Hedge Before You Plant 20 of Them
Boxwood vs privet: compare growth rates, invasive status by state, annual pruning costs, pet safety, and the non-invasive cultivar option before you plant.
Both hedges work. The question is which one works for your yard—and that answer changes depending on your zone, your deer pressure, how often you are willing to trim, and whether you share your garden with a dog. Boxwood and privet look interchangeable on a spec sheet. In practice, privet grows roughly 8 times faster, is regulated as invasive in more than 19 states, and both plants are toxic to pets—a detail most comparison guides only mention for privet.
This guide covers growth rates and their hidden pruning cost, zone-by-zone suitability, boxwood’s escalating disease risk, privet’s invasive footprint mapped by region, and a non-invasive privet alternative that most gardeners never hear about. If you want to compare other shrub options alongside this choice, the flowering shrubs comparison guide covers lilac, hydrangea, and crepe myrtle for context.
Quick Comparison: Boxwood vs Privet
| Boxwood | Privet | |
|---|---|---|
| Mature height | 2–15 ft (cultivar-dependent) | 3–35 ft (species-dependent) |
| Annual growth | 3–6 in | 18–25+ in |
| USDA Zones | 4–9 | 5–10 (varies by species) |
| Sun | Part shade to full sun | Full sun to part shade |
| Watering | Moderate; consistent moisture | Low–moderate once established |
| Pruning frequency | 1–2 times/year | 3–4 times/year |
| Evergreen? | Yes | Semi-evergreen in cold zones |
| Deer resistant | Yes | No |
| Invasive risk | None | High in 19+ states |
| Pet toxic | Yes (dogs, cats, horses) | Yes (dogs, cats, horses) |
Growth Rate: The Number That Changes Everything
Privet grows roughly 18 to 25 or more inches per year depending on species, according to Clemson Cooperative Extension. Boxwood grows 3 to 6 inches. That gap is not just about patience—it determines your annual maintenance schedule.
To keep a neat privet hedge, plan on 3 to 4 trim sessions per year. Boxwood needs one structural trim in late spring after the growth flush, with a possible light touch-up in late summer. Over a decade, that works out to roughly 10 to 20 sessions for boxwood versus 30 to 40 for privet. If you pay for lawn care, the cost difference is significant. If you do it yourself, it is real time every growing season.
Privet’s speed has one genuine advantage: fast privacy screening. A 3-gallon nursery privet planted at 2 to 3 feet will reach 6 feet in 2 to 3 growing seasons. The same-sized boxwood takes 6 to 10 years. For gardeners who need a fence-height screen quickly, nothing in the formal-hedge category competes with privet on speed.
Boxwood: Formal Precision, Rising Risk
Boxwood’s appeal runs deep: evergreen year-round, reliably deer-resistant, holds its shape with minimal trimming, and available in sizes from 2-foot edging plants to 15-foot specimens. The size range across cultivars makes it adaptable to almost any scale:
- ‘Suffruticosa’ (dwarf English boxwood): 2 to 3 feet—the classic knot garden edging plant
- ‘Green Gem’: 3 to 4 feet, cold-hardy rounded mound for zones 4 to 9
- ‘Green Mountain’: 4 to 5 feet, upright form suited for taller formal hedges
- Korean boxwood (Buxus sinica var. insularis): the hardiest species, zones 4 to 9
Boxwood prefers a soil pH of 6.8 to 7.5 and well-drained conditions—never plant near downspouts or low areas where water collects. According to Clemson Cooperative Extension, boxwood is shallow-rooted and needs consistent moisture during dry spells, with 2 to 3 inches of organic mulch helping regulate soil temperature and moisture year-round. Its deer resistance is one of its most practical advantages: where deer browse freely, most formal hedging options fail, but boxwood holds.
The risk profile has shifted since 2011. Boxwood blight (Calonectria pseudonaviculata), first identified in the UK in the mid-1990s, has spread to more than 30 US states. It causes rapid defoliation, stem cankers, and dieback—and the fungus can persist in soil for five or more years, meaning you cannot simply remove affected plants and replant the same spot without risk. Box tree moth, an invasive Asian pest now established in parts of North America, adds additional defoliation pressure. The UConn Home and Garden Education Center notes that these threats change the calculus on cultivar selection: the BetterBoxwood and NewGen hybrid series carry improved blight resistance and are worth the premium in humid southeastern and mid-Atlantic gardens.
For pruning once your hedge is established, the complete shrub pruning guide covers timing, technique, and the difference between shearing for shape and thinning for plant health.
Privet: Fast Screen, Complicated Legacy
Privet’s practical strengths are real. It fills in fast, tolerates a wide range of soils, shrugs off drought once established, and regenerates quickly after hard cutting. For a dense privacy screen, it offers strong value per dollar and year.
The complication is ecological. Seven privet species grow across the US, and all produce berries that birds eat and disperse into surrounding woodlands. Illinois Extension lists privet as regulated or documented as invasive in more than 19 states: New York, New Jersey, Massachusetts, Maryland, Virginia, West Virginia, Pennsylvania, Indiana, Kentucky, Tennessee, Alabama, Georgia, South Carolina, Florida, California, Oregon, Maine, and New Hampshire. In Maryland, border privet (Ligustrum obtusifolium) is a prohibited species under state law, according to the University of Maryland Extension. In the Southeast, Chinese privet (Ligustrum sinense) has been classified a “severe threat” by the South Carolina Exotic Pest Plant Council. Left unchecked, privet forms dense thickets in forest understories that outcompete native plants and slow the regeneration of mature canopy trees.
For species selection by climate:
- California privet (Ligustrum ovalifolium): zones 5 to 8, to 15 feet—most adaptable for northern gardeners
- Japanese privet (Ligustrum japonicum): zones 7 to 10, to 10 feet, grows 25-plus inches per year—outstanding for southern climates
- European privet (Ligustrum vulgare): zones 4 to 7, but semi-deciduous to fully deciduous in hard winters
Unclipped privet blooms in spring with white flower clusters. The fragrance is strong and polarizing—pleasant to some, sharp and disagreeable to others. Privet belongs to the Oleaceae family alongside olive and ash, and its pollen is associated with respiratory sensitivity in people who already react to those plants. Per Clemson Cooperative Extension, regular clipping removes flower-bearing branch tips before they develop, so a tightly maintained hedge rarely blooms. If fragrance or allergy is a concern, consistent shearing solves the problem.
If you are considering privet as part of a wildlife-friendly planting scheme, the wildlife hedgerow guide covers native hedgerow alternatives that provide similar structure with better habitat value for birds and pollinators.
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Pet and Child Safety: A Tie You Were Not Expecting
Most comparison articles flag privet as the toxic plant and leave boxwood out of the discussion. The ASPCA lists both as toxic to dogs, cats, and horses.
Privet contains terpenoid glycosides. The most common clinical signs in dogs and cats are gastrointestinal upset; more severe cases show incoordination and elevated heart rate. Boxwood contains steroidal alkaloids, primarily buxine. Signs in dogs and cats are vomiting and diarrhea; in horses, boxwood ingestion is associated with colic, respiratory failure, and seizures—a more serious risk profile than privet in large animals.
Neither plant belongs in a garden where pets graze or where toddlers play unsupervised near the hedge base. Plant placement matters as much as species choice: a hedge along a fence line that pets cannot reach is safer than relying on deterrence.
The Non-Invasive Privet Option
If privet’s growth speed appeals to you but you are in one of the 19-plus states where it spreads invasively, Sunshine Ligustrum (Ligustrum sinense ‘Sunshine’) is a sterile cultivar worth knowing about. It produces no fruit and cannot spread by seed or bird dispersal. Mississippi State University Extension confirms it poses no invasion threat for precisely this reason: the mechanism that makes conventional privet invasive—prolific berry production eaten by birds—does not exist in this plant.
Sunshine Ligustrum matures to about 6 feet tall by 4 feet wide and holds its golden-yellow foliage year-round in zones 7 to 10. In zone 6 it behaves as semi-deciduous. It requires full sun to maintain its color—it turns yellow-green and sparse in shade. It is also drought-tolerant once established.
Two distinctions matter: Sunshine Ligustrum is not the same as waxleaf privet (Ligustrum japonicum ‘Texanum’), which is not sterile and does produce berries. And at a mature height of around 6 feet, it is a compact plant—if you need a hedge taller than 6 feet, other options are better suited. For gardeners who want a fragrant, striking alternative to either plant, the lavender hedge guide covers a very different but equally effective approach for dry, sunny sites.
Which One Should You Choose?
The decision hinges on three questions: How fast do you need coverage? Are you in a state where privet is regulated as invasive? Do deer resistance and low pruning frequency matter more than speed?
| If your priority is | Choose |
|---|---|
| Formal, classic look with year-round evergreen coverage | Boxwood |
| Fastest possible privacy screen | Privet (check invasive status first) |
| Deer resistance with minimal annual pruning | Boxwood |
| Low cost in zones 5–8, non-invasive state | California privet |
| Fast growth in invasive-risk states, zones 7–10 | Sunshine Ligustrum |
| Cold hardiness to zone 4 | Korean boxwood or ‘Green Gem’ |
| Humid SE region with blight pressure | BetterBoxwood or NewGen hybrids |
Frequently Asked Questions
Is privet illegal to plant in my state?
Privet is not broadly illegal to plant, but it is regulated or listed as an invasive plant in more than 19 states. States with regulations or documentation include New York, New Jersey, Massachusetts, Maryland (where border privet is a prohibited species), Virginia, West Virginia, Pennsylvania, Indiana, Kentucky, Tennessee, Alabama, Georgia, South Carolina, Florida, California, Oregon, Maine, and New Hampshire. Regulations vary—some states prohibit sale, others list the plant for awareness only. Check with your state’s department of agriculture or invasive species council before purchasing.
How long does it take to grow a 6-foot hedge from nursery stock?
Starting from 3-gallon plants at 2 to 3 feet tall: privet reaches 6 feet in 2 to 3 growing seasons. Boxwood takes 6 to 10 years depending on the cultivar. Japanese privet is the fastest at 25 or more inches per year, according to Clemson Cooperative Extension. For fast coverage, privet wins decisively—nothing in the formal-hedge category competes with it on speed.
Does privet smell when it blooms?
Yes. Privet produces dense white flower clusters in spring, and the fragrance is polarizing—sweet and strong to some, sharp and unpleasant to others. The scent is most intense on still, humid days. A hedge sheared consistently won’t bloom much, since trimming removes the flower-bearing branch tips before they develop. Sunshine Ligustrum, the sterile cultivar, produces no flowers at all and is a good option if fragrance is a concern.
Sources
- Clemson Cooperative Extension HGIC. Boxwood. Home and Garden Information Center, Clemson University
- NC State Extension. Buxus (Box, Boxwood). North Carolina Extension Gardener Plant Toolbox, NC State University
- Clemson Cooperative Extension HGIC. Ligustrum (Privet). Home and Garden Information Center, Clemson University
- University of Maryland Extension. Privet. University of Maryland Extension
- Illinois Extension. Invasive Privet. University of Illinois Urbana-Champaign Extension
- Mississippi State University Extension. Sunshine Ligustrum brings bright color, does not invade. Mississippi State University Extension Service, 2022
- UConn Home and Garden Education Center. The Challenges of Boxwood: Pests, Diseases, and Alternatives. University of Connecticut, 2025
- ASPCA Animal Poison Control Center. Privet. American Society for the Prevention of Cruelty to Animals
- ASPCA Animal Poison Control Center. Boxwood. American Society for the Prevention of Cruelty to Animals
