Rugosas, Canadian Explorer roses and a short list of tough shrub roses such as Knock Out come through a Massachusetts winter with little help. Hybrid teas, grandifloras and many of the potted roses sold each spring do not, at least not without fall work. The gap between the two groups shows up in the first hard January cold snap. Below are the zones that matter, the named roses worth buying, the ones to baby or skip, and the label details that separate them. The broader basics live in our guide to growing roses in Massachusetts.
Which roses survive a Massachusetts winter
Massachusetts spans USDA zones 5a to 7b, a wider spread than most people expect from a state this size. The USDA system rests on a single variable, the average annual extreme minimum temperature. The cold end sits in the Berkshires and the interior hills. The mild end runs along the coast, Cape Cod and the islands. A rose that sails through in Plymouth can be a gamble in Pittsfield.
Which rose types clear zone 5a without help?
Rugosas lead the list. They are the beach roses you see growing wild in the dunes on Cape Cod, and they shrug off cold, wind and salt spray. Hybrids built on rugosa parentage inherit much of that toughness. So does the Explorer series, bred in Canada for prairie and Quebec winters, with names like William Baffin, John Cabot and Henry Hudson. Most of the old European garden roses, the gallicas and albas, also take cold well, though they bloom once a year.
Own-root shrub roses in general fare better than grafted ones. When canes die back, an own-root plant regrows from its own crown as the same rose.
Where do hybrid teas start needing help?
In zone 5 a hybrid tea needs real protection every winter, and in much of zone 6 it still benefits from it. Only in the mildest coastal pockets of zone 7 can you sometimes leave one alone, and even there a hard winter can kill the canes. The method for protecting them is covered in Protecting Roses Through a Massachusetts Winter.
Cold is not the only hazard. Boston’s Logan Airport station, the reference point for the state’s capital, shows a 3-in-10 chance of a 32°F freeze after about April 8 in spring and before about November 3 in fall, according to the latest 30-year NOAA NCEI Climate Normals. Those are probabilities, not guarantees, and inland suburbs and the Berkshires freeze earlier in fall and later in spring. A warm stretch in March can wake a rose early, and a freeze after that burns the new shoots. Hardy types shrug this off. Tender ones lose a season of growth.
Named roses that hold up here
Specific names beat general advice at the garden center. These five are widely sold, easy to find, and have a record in cold climates. Rows run roughly from toughest to most conditional.
| Rose | Type | What it handles | What to expect |
|---|---|---|---|
| Therese Bugnet | Hybrid rugosa shrub | Severe cold, wind | Pale pink, fragrant, reddish canes; heaviest bloom in early summer |
| Hansa | Rugosa shrub | Severe cold, salt spray, sandy soil | Double, strongly scented blooms; large hips; spreads by suckers |
| William Baffin | Explorer climber | Severe cold | Tall, vigorous, little scent; needs a sturdy support |
| Knock Out | Shrub rose | Zone 5 winters, with some dieback in hard ones | Blooms on new growth, so it recovers; repeats until frost |
| New Dawn | Climber | Most of the state | Repeat-blooming, soft pink; may lose cane tips in the coldest hills |
Which shrub roses are the safest bet?
Therese Bugnet and Hansa are the two I would hand to a first-time buyer in the Berkshires or the central hills. Both are rugosa-type shrubs that can be planted and left alone through winter. Hansa tolerates road salt and sandy ground, which makes it a good pick for a roadside border or a seaside lot. Give it room, because it spreads.
Knock Out is the mainstream choice, and its reputation for disease resistance is largely deserved, which can keep spraying off your to-do list (see Rose Diseases in Massachusetts: What the Climate Here Actually Brings for what still turns up). In a hard winter the canes can die back, but because it flowers on new wood, it bounces back. Canes that look dead in March often leaf out lower down, so wait until new growth shows before cutting out dead wood.
Which climbers hold up here?
New Dawn is the old reliable among climbers, with a long record and repeat bloom. In the coldest hills expect some tip dieback in harsh winters. William Baffin is the stronger pick for the cold end of the state, among the hardiest climbers sold. It trades fragrance for toughness.
Sold here, but not for this zone
Garden centers and big-box stores in Massachusetts stock roses from national growers, and those growers ship the same plants to Georgia and Oregon. The tags often read zone 5 to 9. That span covers most of the country, and the cold edge of it is a stretch for the colder parts of Massachusetts. Some roses on the shelf in April will not come through a hard winter without work.
- Hybrid teas such as Peace and Mister Lincoln: classic long-stemmed roses, usually grafted, which die back hard in zone 5.
- Grandifloras and many floribundas: related stock with the same weakness at the graft.
- Grafted climbing hybrid teas: the canes you tie up are the part most exposed to wind and cold.
- Potted miniatures and gift roses: forced into bloom indoors for holidays, and usually not bred for outdoor winters.
- Many English-style roses: hardiness varies by variety, and several do better in the milder southeast than in the hills.
None of these is a bad rose. They simply carry a recurring chore. A hybrid tea in Worcester County, set out without protection, may bloom well for one summer and then lose its canes to the graft by spring. Roses also arrive on the shelf in leaf, grown under cover in milder places, and soft growth is slower to harden than a plant raised outdoors here.
If you want one anyway, plant it where wind is lowest and plan on protecting it every fall once the ground starts to freeze. The steps for mounding and wrapping are laid out in the winter protection guide. Treat a hybrid tea as a seasonal commitment and you will not be surprised in April.
What to check on the label before buying
A tag tells you more than the photo does. Three things matter most: the grade, whether the plant is own-root or grafted, and the hardiness zone printed on it.
What does the grade on a rose label mean?
Bare-root roses are sold by grade, and No. 1 is the top. A No. 1 plant has more canes and thicker ones than the lower grades (No. 1½ and No. 2), which gives it more to lose over winter and still recover. Potted roses usually carry no grade, so judge them by pot size and by the number of firm, green canes. Skip plants with shriveled, blackened or soft canes.
Why does own-root matter more in colder zones?
A grafted rose has a swollen knob at the base, the bud union, where the named variety was attached to a hardy rootstock. If cold kills the plant above that point, the rootstock sends up its own shoots, often a thorny, single-flowered rose that is nothing like what you bought. An own-root rose has no union. If it freezes to the ground, whatever regrows is the same variety.
The colder the winter, the more dieback to expect, so that difference matters more every step toward 5a. The label will say “own root” or “grown on its own roots” when it applies. Choose own-root plants whenever you are shopping for the Berkshires, the central hills or any exposed site.
As for the zone number, treat it as the plant’s limit. A rose rated for zone 5 is at its edge in 5a, the colder half of that zone, so one rated a zone colder gives you margin.
Checking this against your own county
The zone map and the Logan numbers are reference points, and your yard can run colder or warmer depending on elevation, wind and how close you are to the coast. UMass Extension is the state’s land-grant extension service, and its staff and publications cover the conditions in each part of Massachusetts, including which roses do well locally. Before a big purchase, ask which zone your town falls in and which roses have done well nearby. A short call can save you from replacing a dozen plants after a hard winter.
Common questions
Is Knock Out hardy in the Berkshires?
It generally survives zone 5 winters, but in the coldest parts of the Berkshires expect canes to die back in hard winters. Because it flowers on new growth, it usually recovers by summer. Rugosa-type roses are the safer choice for the coldest sites.
Can I grow hybrid teas in Massachusetts?
Yes, with protection each winter. In zone 5 they need real help, and in zone 6 they still do better with it. Grafted plants carry the added risk that a hard winter kills the named variety and leaves the rootstock.
Do rugosa roses handle salt on Cape Cod?
They do. Rugosas grow wild along the shore and tolerate salt spray, wind and sandy soil. Hansa is a good garden example, though it spreads by suckers and needs room.
Do the hardy roses also resist disease?
Many do. Knock Out and most rugosas are known for resisting black spot, though no rose is immune. For what shows up in this climate and how to handle it, see Rose Diseases in Massachusetts: What the Climate Here Actually Brings.