Mouse Infestation in a Garden

Woodmouse (via Wikimedia Commons and, CC BY-SA 4.0)

Mouse infestations in a garden can be a major problem for homeowners and gardeners. These small rodents can cause damage to plants, structures, and equipment, as well as spread diseases. They are also known to consume seeds, fruits, and vegetables, which can be a significant loss for a gardener. Mice are very agile and can fit through small openings, so they can quickly infiltrate a garden.


  • Gnaw marks on seedlings, fruits, vegetables, and other plants
  • Damage to garden structures, such as holes in plastic greenhouse covers
  • Damage to equipment, such as gnawed electrical wires
  • Droppings and urine stains around the garden
  • Tracks and burrows in soil or mulch
  • Unusual noises coming from the garden at night

What is a Mouse

  • Small, slender body
  • Pointed snout
  • Large, round ears
  • Long, thin tail
  • Fur color can vary from gray to brown
  • Adult mouse can be 2.5-4 inches in length
  • Adult mouse can weigh about 0.5 ounces

Treating a Mouse Infestation

It’s important to remember that a combination of these methods will likely be needed for an effective treatment and It’s also important to monitor the situation and reassess the effectiveness of the treatment regularly.


  • Setting up mouse traps in areas where mice are active.
  • Traps can be baited with a small amount of food, such as peanut butter or cheese.
  • Once a mouse is caught, it should be disposed of humanely, such as by releasing it into a wooded area far from your property.
  • It’s important to check the traps regularly and dispose of any dead mice promptly.
  • It’s also important to place the trap in the right location, such as along walls or in areas where droppings have been found.
  • Trapping can be an effective method to control a small infestation but may not be practical for larger infestations.


  • Poison baits can be used to kill mice, but they should be used with caution as they can also harm non-target animals, such as birds or pets.
  • It should be placed in areas that are not accessible to children or pets and should be placed in tamper-proof stations.
  • It’s important to follow the instructions on the label carefully and use the bait in the recommended amounts.
  • It’s also important to monitor the area where the poison has been placed and dispose of any dead mice promptly.
  • Poison baits can be effective in controlling a mouse infestation, but it can take time for the poison to work, and the infestation may continue during this period.


  • This involves sealing off any openings or cracks that mice could use to enter the garden.
  • Mice can fit through very small openings, so it’s important to be thorough when sealing up the garden.
  • This can include using caulking or steel wool to fill in gaps around doors and windows, and using wire mesh or hardware cloth to cover vents or other openings.
  • It’s important to inspect the property regularly and look for new holes or gaps that may need to be sealed.
  • Exclusion is a long-term solution that can prevent future infestations.


  • Repellents are substances that can be sprayed or applied to the garden to deter mice from entering.
  • Repellents can be made from natural ingredients such as peppermint oil, clove oil, or ammonia.
  • They can also be made from chemical ingredients such as naphthalene or mothballs.
  • Some repellents are available in a granular form that can be scattered around the garden.
  • Repellents may not be effective in all cases and the effectiveness of the repellent may depend on the type of repellent used and the severity of the infestation.

Habitat modification

  • This involves modifying the environment in a way that makes it less appealing to mice.
  • This can include removing piles of debris, cutting tall grass, and cleaning up spilled seed or bird feed.
  • It can also include reducing the amount of food available to the mice, such as by cleaning up spilled seed or bird feed.
  • Habitat modification can make it less likely for mice to establish themselves in your garden and can also help to reduce the population of mice in the area.