Answer: No, lime won't deter snakes or rodents. In fact, it can be hazardous to humans and household pets, so don't spread lime in hopes is discouraging pests. The most effective way to discourage snakes around a home, such as in the yard or garden, is to make the area unattractive to them. Remove their habitat, including hiding places, foraging areas, and food resources.
In early spring, snakes are attracted to hot spots, such as metal cans or other heat-conducting items. Snakes are most active during warm months, when they are attracted to cool, damp, sheltered areas. Remove hiding cover for snakes near homes, including piles of boards or firewood, rock or brick piles, and weedy growth. Check around cement walks or porches for cracks or holes that might provide access to snakes for shelter. Repair or close these access points to prevent their use.
If you have firewood stored for a fireplace or woodstove, keep the stack away from the house. Wood can be temporarily stored near the house during cold months when snakes are inactive. Use a rack to keep the firewood at least 12 inches above the ground; snakes will be discouraged if the wood (shelter) is separated from the soil. Snakes like to lay eggs in compost piles, so keep those away from the house. Keep fencerows and the edges of wooded areas free of debris, brush, and other cover.
Hope this information is helpful!
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