Outdoor living walkways in Minnesota face a unique combination of challenges: bitter winters with frequent use of deicing salt, freeze-thaw cycles, heavy snow removal, and warm, dry summer conditions in some parts of the state. Choosing the right plants for edges, borders, and adjacent planting beds is critical to keep your walkway attractive, safe, and low-maintenance year-round. This article provides practical, site-specific guidance for selecting and caring for salt-tolerant plants that are also cold-hardy for Minnesota climates.
Why salt matters for Minnesota walkways
Road and driveway salt (most commonly sodium chloride) is effective at melting ice, but it damages plants in two main ways: salt spray and salt in the soil. Salt spray hits foliage directly and causes leaf burn and desiccation. Salt in the soil increases soluble salt concentration and can inhibit water uptake, cause nutrient imbalances, and reduce root function. In northern climates like Minnesota, repeated winter salting combined with low spring precipitation can lead to salt accumulation in soils where leaching is limited.
Recognizing how salt injury appears and where it accumulates helps you pick plants and design planting locations that will survive and thrive.
Symptoms of salt damage to watch for
- Leaf margin browning and scorch, beginning on older leaves.
- Twigs and branch dieback starting at the tips.
- Stunted growth and sparse leafing in spring.
- Delayed leaf-out or overall decline over several seasons.
If you observe these signs near walkways, the problem may be salt exposure rather than a disease or nutrient deficiency.
Understand the type of exposure: spray vs. soil
Salt spray is most harmful to plants directly adjacent to cleared pavement and snow piles because wind and splashing deposit salt on leaves and stems. Salt in the soil is a persistent problem where snow piles melt near beds and salt-laden water drains into plant root zones. Some species tolerate spray but not saline soils, and vice versa. When planning plantings, identify the dominant exposure for each micro-site and choose species accordingly.
Site assessment: practical steps before you plant
- Map the walkway edges and note where plows pile snow or where runoff collects.
- Test the soil near the walkway in late winter or early spring. Soil tests through your county extension or a commercial lab can measure soluble salts or electrical conductivity (EC). Simple home EC meters are available, but lab results are more reliable.
- Note sun exposure, drainage, and compaction. Salt damage is worse in compacted, poorly drained soils.
- Record historical maintenance: how much salt is used, whether sand is applied, and whether salt is applied directly to planted edges.
A realistic site assessment lets you design plantings that avoid the worst exposure and use plants that match each micro-site.
Plant selection principles for salt-tolerant walkways
- Favor plants with demonstrated tolerance to chloride salts and cold hardiness to Minnesota zones (commonly USDA zones 3 to 5 depending on location).
- Use native or non-invasive species when possible. Native plants often tolerate local stresses and support biodiversity.
- Place the most tolerant species closest to the pavement and more sensitive species farther back.
- Improve soil structure and drainage before planting to reduce salt concentration in the root zone and to promote leaching.
- Use hedgerows, shrubs, or low walls as physical buffers to intercept salt spray.
Recommended plant types and examples
Below are categories and plant options that combine salt tolerance with Minnesota cold hardiness. All listed plants are commonly hardy in much of Minnesota; check local hardiness and exposure for your exact location.
Shrubs and woody options (good for edges and buffers)
- Juniperus spp. (junipers): evergreen, excellent tolerance to salt spray and saline soils, low maintenance. Varieties include low creeping junipers for groundcover and upright species for screening.
- Thuja occidentalis (eastern arborvitae): widely used as a winter screen near driveways; tolerates salt and cold.
- Cornus sericea (red osier dogwood): native, hardy, tolerates wet and some saline conditions; good for tougher sites where salt runoff collects.
- Cotoneaster spp. (low-growing cotoneaster): salt-tolerant, low habit, useful as a groundcover along walkways; choose non-invasive cultivars.
- Hippophae rhamnoides (sea buckthorn): highly salt-tolerant and extremely cold-hardy; useful on exposed sites. Note: plants have thorns and produce many berries.
- Amelanchier alnifolia (serviceberry/Saskatoon): moderately salt-tolerant, native, provides spring flowers and summer fruit.
When selecting shrubs, avoid known invasive or pest-prone species. Check local lists for banned or discouraged plants.
Perennials and groundcovers
- Sedum spp. (stonecrop): succulent groundcovers very tolerant of salt and drought; excellent right at the pavement edge.
- Sempervivum spp. (hens and chicks): compact, hardy succulents that tolerate spray and compact soils.
- Festuca rubra and Festuca ovina (red and sheep fescue): fine-leaved fescues tolerate salt and form durable groundcovers in poor soils.
- Achillea millefolium (yarrow): drought and salt-tolerant perennial with long-lived clumps.
- Echinacea purpurea (coneflower) and Rudbeckia spp. (black-eyed Susan): moderately tolerant perennials that perform well in tougher beds set back from direct spray.
Ornamental grasses and sedges
- Leymus arenarius (lyme grass) and other dune grasses: excellent salt tolerance and hardy in cold climates; use for exposed, sandy sites.
- Panicum virgatum (switchgrass): moderately tolerant, deep-rooted, provides texture and winter interest.
- Native sedges (Carex spp.): many species handle wet, compact, and saline-adjacent sites; choose species suited to sun or shade.
Trees for larger properties (use sparingly near direct salt sources)
- Juniperus virginiana (eastern redcedar): tolerant of salt and drought; good windbreak or screen.
- Picea glauca (white spruce): moderately tolerant, hardy, and used frequently as a street or property tree.
- Tilia cordata (littleleaf linden) and Gleditsia triacanthos var. inermis (thornless honey locust) show some salt tolerance but evaluate site specifics before planting.
Avoid planting sensitive-species like many maples and birches immediately adjacent to salted walkways.
Planting and soil management techniques
- Planting distance: place the most salt-tolerant plants within 1 to 3 feet of the pavement edge. More sensitive plants should be at least 6 to 10 feet back or separated by a barrier.
- Raise beds or berms: elevating the planting zone helps salt-laden meltwater flow away from roots and promotes leaching.
- Improve drainage and organic matter: mix well-aged compost into planting soils to increase water infiltration and biological activity that helps buffer roots from salts.
- Mulch: a 2 to 3 inch layer of coarse organic mulch reduces evaporation and helps reduce salt splash onto lower stems; do not over-mulch against trunks.
- Leaching: in spring, flush affected beds with several inches of water spread over several sessions to leach soluble salts below the root zone. Do not direct wash into storm drains.
- Avoid gypsum as a cure-all: gypsum can help sodic soils dominated by sodium, but it does not remove chloride salts from soil. Leaching is the most effective remedy for chloride-based salts.
Winter maintenance practices that reduce plant damage
- Limit salt use where plantings are present. Use the minimum effective amount and apply only to walking surfaces.
- Use sand or traction materials away from plant beds to reduce the need for additional salt.
- When snow is plowed, avoid piling snow directly on planting beds. Create designated snow storage areas away from sensitive plantings.
- Consider placing temporary protective barriers (boards, burlap screens) to block salt spray from plowed snow banks.
- Rinse accumulated salt off plant foliage in late winter or early spring if feasible, especially for evergreen shrubs.
Long-term monitoring and replacement strategy
- Monitor susceptible plantings each spring. Plants stressed by salt often fail gradually; early replacement with more tolerant species prevents repeated maintenance and aesthetic decline.
- Use a graduated planting plan: start with the most tolerant species at the pavement edge, a transition band of moderately tolerant plants a few feet back, then sensitive ornamentals and perennials farther into the yard.
- Replace declining non-tolerant species as part of scheduled bed refreshes with salt-hardy alternatives to reduce cumulative damage over years.
Practical takeaways
- Identify whether salt spray or soil salinity is your dominant problem and choose plants accordingly.
- Use hardy, salt-tolerant shrubs, groundcovers, fescues, sedums, and dune grasses for the zone closest to the walkway.
- Improve soil drainage and perform spring leaching where salts accumulate.
- Use physical buffers and adjust salt application and snow storage practices to protect plantings.
- Favor native and non-invasive salt-tolerant species to support long-term landscape resilience.
Selecting salt-tolerant, cold-hardy plants and pairing them with smart site preparation and winter practices will give you attractive, resilient walkway borders in Minnesota. With the right species and a maintenance plan that emphasizes leaching and reduced salt exposure, you can protect plant health while keeping walkways safe in winter.