Introduction
Winter road salt helps keep sidewalks and streets safe, but it can wreak havoc on your trees. When salt seeps into the soil or gets sprayed onto branches, it can cause dehydration, stunt growth, and even lead to long-term health issues. The good news? You can take steps to minimize the damage and keep your trees thriving. Here’s how.
1. How Salt Harms Trees
Salt affects trees in two major ways: by drying out roots and bark and by altering the soil’s nutrient balance. Over time, this weakens the tree’s ability to take up water and essential minerals.
Signs of Salt Damage:
- Browning or yellowing needles on evergreens
- Scorched or curled leaves on deciduous trees
- Stunted growth or branch dieback in the spring
2. Shield Trees from Salt Spray
Trees near roads and walkways are most at risk of salt exposure. Creating a physical barrier can help block salt spray and prevent it from accumulating in the soil.
What You Can Do:
- Install burlap screens or snow fencing around vulnerable trees.
- Pile snow on the side of walkways away from tree roots to prevent salt buildup.
3. Choose a Tree-Friendly De-Icer
If you’re applying de-icer near your trees, consider using a product that’s less harmful to plants.
Safer Alternatives:
- Sand or gravel for traction
- Calcium magnesium acetate (CMA), which is less damaging than traditional rock salt
- Mixing salt with sand to reduce the amount used
4. Flush the Soil in Spring
If your trees have been exposed to salt, you can help them recover by flushing the soil with fresh water as soon as the ground thaws.
How to Do It:
- Deeply water the area around your trees to dilute the salt buildup.
- Add gypsum to help improve soil structure and reduce salt damage.
5. Select Salt-Resistant Trees
If you’re planning to plant near roads or sidewalks, choosing salt-tolerant species can help minimize long-term issues.
Best Options for Salt-Prone Areas:
- Red maple
- White oak
- Eastern red cedar
Conclusion
Salt is a winter necessity, but it doesn’t have to spell disaster for your trees. By using protective barriers, safer de-icers, and flushing the soil in spring, you can prevent salt damage and keep your trees in top shape. If you’re concerned about salt exposure or need professional tree care, Environmental Advantage’s certified arborists are here to help.
For more information or to schedule a consultation, visit Environmental Advantage.