Salt Questions · Home, wellness & DIY
Can salt kill weeds in a gravel driveway permanently?
Short answer
Salt will kill weeds, but not permanently, and it isn't recommended. Rain gradually washes it away, so weeds return, while the salt runs off into lawns, garden beds and drains, where it harms plants, soil and waterways. It can also damage concrete and metal. Pulling, boiling water or mulch are safer choices.
Kills weeds temporarily but harms soil, plants and water nearby
How salt kills plants
Salt draws water out of plant roots and is toxic to plant tissues in large amounts. Heavy salting can stop plants growing on that spot for a season or more.
Why it's a bad idea
- It spreads: rain carries salt into nearby lawns, shrubs, trees and streams.
- It isn't permanent: as salt leaches away, weeds return.
- It damages soil: sodium breaks down soil structure, making it hard and poorly drained.
- It damages hard surfaces such as concrete edging and metal.
Better options for gravel
Hand-pulling after rain, pouring boiling water on weeds, a landscape fabric under the gravel, and topping up gravel regularly.
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Cite this page
For school projects and reports. Teachers often prefer the original sources too: see the list below.
The Salt Almanac. (2026, November 8). Can salt kill weeds in a gravel driveway permanently. https://saltalmanac.com/answers/can-salt-kill-weeds-in-a-gravel-driveway-permanently
“Can salt kill weeds in a gravel driveway permanently.” The Salt Almanac, 8 Nov. 2026, saltalmanac.com/answers/can-salt-kill-weeds-in-a-gravel-driveway-permanently. Accessed [today's date].
“Can salt kill weeds in a gravel driveway permanently.” The Salt Almanac. Last modified November 8, 2026. https://saltalmanac.com/answers/can-salt-kill-weeds-in-a-gravel-driveway-permanently.
Original sources
- Hodgson L. Garden myth: salt makes a good weed killer. Laidback Gardener, 2018. https://laidbackgardener.blog/2018/07/27/garden-myth-salt-makes-a-good-weed-killer/
- University of Wisconsin–Madison Extension. Reducing deicing salt damage this winter, 2025. https://hort.extension.wisc.edu/2025/11/17/reducing-deicing-salt-damage-this-winter/