All twelve hedge species commonly planted here survive Rhode Island cold, from the zone 6a winters inland to the 7b winters near the coast (USDA Plant Hardiness Zone Map, 2023). Nothing on the list dies of freezing. The mistakes that cost people hedges come later. Three of the twelve can never be cut back once they outgrow their spot, and the soil under many yards is acid enough to change how the planting row should be prepared.
What actually holds in Rhode Island
The USDA hardiness zone rests on a single variable, the average annual extreme minimum temperature. Rhode Island spans 6a to 7b, which means the coldest nights in the northwest hills run colder than those on the shore. Boxwood, American hornbeam, Leyland cypress, inkberry holly, winterberry holly, Eastern red cedar, privet, cherry laurel, yew, arborvitae, Eastern hemlock and arrowwood viburnum all hold across that entire span. None is hardy in only part of the state, and none fails everywhere. Shopping by zone alone narrows nothing, so the choice has to come from what each plant does after year three.
Zone ranges differ from place to place, and so do the lists. The guides for Hedge Plants for Massachusetts: What Holds, and What Only Looks Hardy, Hedge Plants for Iowa: What Holds, and What Only Looks Hardy and Hedge Plants for Indiana: What Holds, and What Only Looks Hardy sort similar plants against very different winters. For the general principles of planting and shaping a boundary, the Hedges overview covers the ground.
Survives is not the same as thrives
A zone number says nothing about wind, standing water, road salt or deer. Evergreen broadleaf plants such as boxwood and cherry laurel can have their foliage scorched brown by winter sun and wind even when the roots and wood are untouched. Eastern hemlock is hardy to the last degree, yet it is vulnerable to hemlock woolly adelgid, an insect pest established in the Northeast, so a hedge of it is a bet on keeping that pest in check. The top of a plant’s published range is often a heat limit rather than a cold one. That matters little at 6a to 7b, but it is worth remembering when you read plant lists written for warmer regions.
One more distinction affects how a hedge looks in January. Inkberry holly keeps its leaves all winter. Winterberry holly loses them, so it gives bare stems and red berries but no winter screen. If privacy in February matters, that difference decides the purchase.
The hedges you can never cut back down
Three of the twelve do not regrow from old wood: Leyland cypress, Eastern red cedar and arborvitae. Cut into the bare brown interior of any of them and the branch stays bare. The only safe cut is into live green foliage, which means the height you plant for has to be the height you can live with permanently.
Leyland cypress is the one that traps people. It grows 3 to 4 feet a year and finishes at 15 to 25 feet as a screen. A row planted along a 6-foot privacy fence will pass the fence quickly, and the only remedy is removal. Eastern red cedar adds 12 to 24 inches a year and reaches 8 to 20 feet, and it takes only light cuts in late winter. Arborvitae is the slowest of the three, at 6 to 9 inches a year with a range of 4 to 15 feet as a hedge. Slow growth hides the problem for years, then a gap or a stray overgrown section turns out to be permanent. Arborvitae can be trimmed in late winter before growth starts, or in midsummer.
Plants that forgive a bad haircut
The other nine regrow from old wood. Yew, boxwood, privet, cherry laurel, inkberry, winterberry, American hornbeam and arrowwood viburnum regrow from old wood, so they can be cut back hard. Eastern hemlock regrows too, though its timing note is late spring and light cuts only, so treat it as forgiving but not tolerant of a radical reset. Privet is the clearest example of a plant built for correction. It grows 2 to 3 feet a year and wants shearing twice a season, in spring and again in midsummer.
Timing matters as much as technique. Boxwood is pruned in late spring after the last frost. The airport reference station for NOAA’s 1991-2020 normals puts the last 32°F freeze between April 7 and April 17 (NOAA NCEI U.S. Climate Normals), but suburban and rural yards usually see the last frost one to two weeks later. The first fall freeze at that station falls between October 24 and November 3, and inland yards typically get it one to two weeks earlier. None of the pruning windows for these twelve falls in fall. If you are reading this in mid-October, plant and water, then keep the shears in the shed until late winter.
Matching the plant to the job
Start with the height you want in ten years, then pick from the plants whose range includes it and whose growth rate you can maintain. The table compares all twelve on the same terms.
| Plant | Height as a hedge | Growth a year | When to prune | Regrows from old wood |
|---|---|---|---|---|
| Boxwood | 2 to 6 ft | 3 to 6 in | Late spring, after last frost | Yes |
| American hornbeam | 6 to 15 ft | 12 in | Midsummer, after first flush | Yes |
| Leyland cypress | 15 to 25 ft (screen) | 3 to 4 ft | Late spring to midsummer | No |
| Inkberry holly (evergreen) | 5 to 15 ft | 6 to 12 in | Late winter, dormant | Yes |
| Winterberry holly (deciduous) | 5 to 15 ft | 6 to 12 in | Late winter, dormant | Yes |
| Eastern red cedar | 8 to 20 ft (screen) | 12 to 24 in | Late winter, light cuts only | No |
| Privet | 4 to 12 ft | 2 to 3 ft | Spring and midsummer | Yes |
| Cherry laurel | 6 to 15 ft | 1 to 2 ft | Late spring, after flowering | Yes |
| Yew | 3 to 8 ft | 6 to 12 in | Late spring, after new growth hardens | Yes |
| Arborvitae | 4 to 15 ft | 6 to 9 in | Late winter, or midsummer | No |
| Eastern hemlock | 10 to 20 ft | 12 to 24 in | Late spring, light cuts only | Yes |
| Arrowwood viburnum | 6 to 10 ft | 12 to 24 in | Right after flowering | Yes |
For a low, formal edge of 2 to 6 feet, boxwood and yew are the matches. Both are slow, at 3 to 6 inches and 6 to 12 inches a year, so a trim keeps them tidy. Yew tops out at 8 feet, which gives room to grow the hedge taller than a boxwood border if you want it to.
For a tall screen the real choice is between speed and control. Leyland cypress and Eastern red cedar give height fast but cannot be reduced. American hornbeam, cherry laurel and Eastern hemlock reach 6 to 20 feet and can be pruned back if the plan changes. For a mixed, wildlife-friendly boundary, arrowwood viburnum and the two hollies are the natural fits. Winterberry bears its berries on female plants, so buy both.
The ground you are planting into
The soil USDA lists as representative of Rhode Island is the Narragansett series, an Inceptisol, a young soil without strongly developed horizons. Its surface layer averages about pH 5.3, which is strongly acid. It is 60 percent silt, 34 percent sand and 6 percent clay, with about 4.0 percent organic matter, and it drains well. That describes the state’s typical ground, not every yard in it. Hill country, river bottoms and any lot a builder has scraped or filled can differ completely.
What the typical profile suggests is a loamy, silty soil that sheds water rather than holding it. That suits yew, and it makes establishment easier for most of the list. A new hedge in well-drained ground still needs deep watering through its first year, particularly in the weeks before the ground freezes. Inkberry and winterberry are the ones to reach for in a low corner of the yard where water lingers.
The 5.3 figure is the series’ recorded surface value, not your pH. Test before adding anything. Lime applied by guess can push a bed past what acid-tolerant plants want just as easily as it can fix a real shortfall. The University of Rhode Island Cooperative Extension can point you toward soil testing and advise on what your county’s soils tend to need. For a new row, digging a single trench to the full planting depth and watching how it drains over an afternoon tells you more about the site than any map.
Common questions
Which hedge plants are hardy in Rhode Island?
All twelve species covered here: boxwood, American hornbeam, Leyland cypress, inkberry holly, winterberry holly, Eastern red cedar, privet, cherry laurel, yew, arborvitae, Eastern hemlock and arrowwood viburnum. Each holds through the full 6a to 7b range.
Which hedge can’t be pruned back once it gets too tall?
Leyland cypress, Eastern red cedar and arborvitae. None of them regrows from old wood, so cuts must stay within live green growth. If a hedge of one of these gets away from you, the fix is replacing it.
When should I prune a hedge?
It depends on the plant. Late winter suits the hollies, Eastern red cedar and, before growth starts, arborvitae. Late spring suits boxwood, cherry laurel, yew and hemlock. Arrowwood viburnum goes right after flowering, and hornbeam in midsummer. None of those windows falls in October, so fall is for planting, not pruning.
Does soil acidity affect which hedge I choose?
The state’s representative soil runs strongly acid, around pH 5.3 at the surface, but your yard may not match it. Get a soil test through your county extension office before adding lime, because a test result is the only number that applies to your planting row.