How to use it:
Soak rags in ammonia and place them in sealed containers with small holes.
Put them near sheds, garages, or woodpiles.
(Use ammonia carefully and keep it away from pets and children.)
7. Lemongrass 
Lemongrass has a strong citrus aroma that is refreshing to humans but may act as a natural deterrent for some pests, including snakes.
How to use it:
Plant lemongrass around garden borders.
Use lemongrass essential oil diluted in water as a spray.
