A garden a mile inland and a garden on the water can share a zip code and live in different climates. Along the Rhode Island coast, from Watch Hill and Westerly to Newport and out to Block Island, winter brings less deep cold than inland New England, but far more wind, salt spray and freeze-thaw swings. Those are what damage coastal plantings, and most of that damage happens quietly between December and March, then shows up as brown evergreens and split bark in April.
Here's how we prepare the coastal properties we care for, and what you can do now to protect yours.
1. Keep watering evergreens until the ground freezes
Winter browning on boxwood, holly, rhododendron and arborvitae is usually not cold damage. It's drying out. Wind pulls moisture from the leaves while frozen soil keeps the roots from replacing it, and coastal wind makes this worse.
If autumn has been dry, give evergreens a slow, deep soak every week or two until the ground freezes, usually in December along the coast. A well-watered plant enters winter with reserves; a thirsty one doesn't recover.
2. Screen the windward side from salt spray
Salt spray burns foliage and builds up in the soil, especially on the side of the property facing the water. For exposed shrubs, a simple burlap screen set on stakes a few inches from the plant, open at the top, breaks the wind and catches salt without trapping heat and moisture against the leaves.
Avoid wrapping burlap tight around a plant. It holds damp air, invites disease and can snap branches under wet snow.
3. Consider an anti-desiccant for exposed broadleaf evergreens
On the most exposed rhododendrons, hollies and boxwoods, an anti-desiccant spray adds a waxy coating that slows moisture loss. Timing matters: apply on a dry day above about 40°F, once plants are fully dormant, and follow the label. It's a useful layer of protection for exposed plants, not a substitute for watering and screening.
4. Mulch after the ground starts to freeze, not before
Mulch in winter isn't about keeping soil warm. It's about keeping it evenly cold. Coastal Rhode Island swings above and below freezing all winter, and that repeated freeze-thaw heaves perennials and shallow-rooted shrubs out of the ground.
A 2–3 inch layer of shredded bark or chopped leaves, applied once the soil begins to freeze, keeps the temperature steady. Keep mulch a few inches back from trunks and stems so rodents don't nest against the bark.
5. Hold off on most pruning
It's tempting to tidy everything in November. Resist on anything that blooms on old wood. The bigleaf hydrangeas that define so many coastal gardens set next summer's flowers in late summer and fall; cutting them back now removes the blooms. The same goes for lilac, azalea, rhododendron and forsythia.
Fall pruning is for dead, damaged or crossing branches and anything that could catch the wind and tear in a storm. Structural pruning of most shrubs and trees waits for late winter, when we can see the framework clearly. (Our guide to when to prune shrubs and trees in Rhode Island covers timing plant by plant.)
6. Leave some perennials standing
Not every bed needs to be cut to the ground. Ornamental grasses, coneflower, sedum and rudbeckia hold their shape through winter, feed birds and catch snow that insulates the crowns below. We cut back anything diseased or floppy and leave the strong structural plants for a late-winter cleanup.
7. Protect against deer and rodents
Deer browse heavily in winter across coastal Rhode Island, and especially on Block Island, where yews, arborvitae, hostas and young trees are favorite targets once other food runs out. Repellents rotated through the season, or netting and fencing around key plantings, prevent a lot of spring regret. Trunk guards on young trees stop voles and rabbits from girdling bark beneath the snow.
8. Be careful with de-icing salt near beds
After a summer of salt spray, the last thing coastal soil needs is more salt. Rock salt (sodium chloride) on walkways and drives washes into nearby beds and lawn edges. Where hardscape borders planting, use calcium magnesium acetate or a plant-safer blend, or sand for traction, and shovel snow away from bed edges rather than onto them.
9. Walk the property after every storm
Nor'easters do more harm on the coast than a hard freeze. After a major storm, check for broken limbs, heaved plants, loosened screens and stakes, and salt-washed beds. Catching a split branch or a pushed-out root ball early is the difference between a quick repair and a replacement. Our post-storm recovery checklist walks through what to look for.
10. Plan next season while the garden is bare
Winter is the clearest view you'll get of a garden's structure. It's the right time to note what struggled, like the shrub that browns every year on the windward corner or the bed that floods, and to plan changes: more salt-tolerant plants on exposed edges, better windbreaks, drainage fixes and new beds ready to plant in spring.
Frequently asked questions
When should I winterize a coastal Rhode Island garden?
Most work happens from early November through December. Watering continues until the ground freezes; mulching and anti-desiccant sprays come once plants are dormant and the soil starts to freeze.
Should I cut back hydrangeas in the fall?
Not bigleaf (mophead and lacecap) hydrangeas. They bloom on old wood, so fall pruning removes next summer's flowers. Remove only dead or damaged stems now.
Why do my evergreens turn brown in winter near the ocean?
Usually it's a combination of winter drying from wind and salt spray burn. Deep watering before freeze-up, burlap windscreens and anti-desiccant sprays on exposed plants all help.
Which plants handle salt spray best?
Bayberry, beach plum, rugosa rose, inkberry, Russian sage, seaside goldenrod and many ornamental grasses tolerate coastal exposure well. The right choice depends on how close the planting is to the water and how much wind it takes.
Do you provide winter garden care on Block Island?
Yes. Lotus cares for properties on Block Island as well as across mainland Rhode Island, including Newport, Westerly and Watch Hill.
A garden that comes through winter well
Coastal gardens reward steady attention more than heroic spring repairs. At Lotus, our garden and estate care for coastal properties includes deep watering before freeze-up, windscreens and anti-desiccant treatment for exposed plantings, storm walks and planning for the season ahead, all handled by the same team that knows your garden the rest of the year. (Wondering who does what? See Landscaper vs. Gardener.)
Want your property ready before the first nor'easter? Get in touch and we'll walk the garden with you.
