Maintaining appropriate soil fertility and moisture conditions to reduce additional stresses, and to help combat desiccation. Grouping tree and shrub species to shield them from wind and drift, with the most tolerant species in higher exposure areas to shield moderately tolerant species. Use salt-tolerant shrubs or herbaceous borders (especially denser evergreens) as windbreaks to help intercept aerial salt drift before it reaches sensitive plants. Establish windbreaks to prevent "wind tunnels" that can carry aerial salts farther and at higher wind speeds. Numerous options exist for reducing salt damage including:Ĭarefully designing planting areas to reduce exposure of trees and shrubs to aerial salt spray. For seashore areas, salt spray damage is seen soon after storms, and occurs inland if salt spray is carried farther by strong winds. Direct signs such as white salt residue are a strong indication that salt spray may be injuring landscape plants. On foliage, salt spray causes leaf burn or scorch, or needle browning. Consider the distance from salty water sources and the severity of storms and winds that carry aerial salt drift inland.Įxamine injury patterns on trees and shrubs. Because aerial salt spray damage may appear similar to damage caused by other stresses, a tree or shrub's location and damage symptoms should be carefully evaluated to correctly identify the damage's cause. How does salt spray affect trees and shrubs?Įxposure to salt spray can cause stem and foliage disfigurement, reduced growth, and often plant death. Additional stresses in these areas, including wind, sun, heat, exposure, heavy traffic and saline soils, increase the likelihood of damage. Salt spray damage to trees and shrubs is most frequently seen on seaside plants and near sidewalks and roads where de-icing salts are applied.
When droplets evaporate, the salt's sodium and chlorine ions can penetrate stems, buds and leaves, causing direct damage. The aerial drift of salt-laden water droplets that are deposited on trees and shrubs causes salt spray damage. The following is information on salt spray damage from Virginia Tech and from UD Extension. Symptoms are just now showing up in plants. The recent storms produced salt spray that was blown inland along the coast of the Delaware Bay.
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