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How to Spread Barn Lime

By Rachel Spradling | Updated September 26, 2017

Thomas Northcut/Lifesize/Getty Images

Items you will need

  • Dust mask

  • Empty coffee can or gallon milk jug with the bottom cut off

One of the never-ending chores in caring for livestock is battling barn flies. Flies look for manure piles and wet barn floors to lay their eggs, so that when the maggots hatch they have plenty of food. Fly maggots can hatch as quickly as 24 hours after the female fly lays her eggs. Sprinkling barn lime on damp floors helps keep the fly population down; flies won’t lay eggs in a dry environment. Barn lime, also known as ag or garden lime, is not actually “lime” at all. It’s made from a crushed stone called dolomite, which is why it’s safe for you to handle and safe for your animals. It’s also used by farmers to control crop soil acidity. Barn lime is a useful tool in controlling your barn fly population.

Put on a dust mask if your barn does not have good ventilation.

Scoop out a can-full of barn lime from the bag.

Find a damp spot on your barn floor. Liberally sprinkle the barn lime over the spot, completely covering it.

Sweep up the barn lime when it becomes damp or soiled and replace it if the spot is still damp. Dispose of the old barn lime in the compost heap.

Photo Credits

  • Thomas Northcut/Lifesize/Getty Images


Rachel Spradling is a writer and editor with over 14 years of experience writing everything from political commentary to training manuals. She graduated from California State University, Chico with a Bachelor of Arts in English. Spradling's work has appeared in "CitiZen" magazine, "Watershed" and "News and Review."