01.04.2025

If ants have invaded your garden, here’s how to combat them.

By Lesia

Ants in the garden can be a real nuisance, disrupting plants and even encouraging other pests like aphids. Here’s a breakdown of how to combat them using both natural and more direct methods:  

1. Natural and Prevention Methods:

  • Identify the Source:
    • Try to locate the ant nest. Eliminating the nest is more effective than just killing the ants you see.
    • Observe where they’re traveling from and to.
  • Remove Food Sources:
    • Ants are often attracted to sugary substances (aphid honeydew) and food scraps.  
    • Keep your garden clean and free of fallen fruit or rotting vegetation.  
    • Control aphid infestations, as ants “farm” them for their honeydew.  
  • Barriers:
    • Diatomaceous Earth (DE): This natural powder is made from fossilized diatoms. It’s abrasive and dehydrates ants. Sprinkle it around plants or ant trails. Be sure to use food-grade DE.  
    • Cinnamon: Ants dislike the smell of cinnamon. Sprinkle it around ant trails or nests.  
    • Vinegar: A mixture of equal parts water and vinegar can be sprayed on ant trails.
    • Citrus Peels: Ants avoid citrus. Place citrus peels around plants or ant trails.  
    • Boiling Water: Pouring boiling water directly onto ant nests can be effective, but be careful not to damage surrounding plants.  
  • Encourage Natural Predators:
    • Some insects, like spiders and ground beetles, prey on ants. Create a welcoming environment for these beneficial insects.  

2. Direct Methods (Use with Caution):

  • Ant Baits:
    • Ant baits contain a slow-acting poison that ants carry back to their nest, eventually killing the colony.  
    • Place baits along ant trails, out of reach of children and pets.  
    • Look for baits containing boric acid or other ant-specific insecticides.
  • Insecticidal Sprays:
    • Insecticidal sprays can kill ants on contact, but they can also harm beneficial insects.  
    • Use these sprays sparingly and follow the product label instructions carefully.
    • When possible use natural based sprays.

Important Considerations:

  • Avoid Pesticides Near Edible Plants: If you’re growing fruits or vegetables, avoid using harsh pesticides.
  • Be Patient: It may take time to eliminate an ant infestation.
  • Identify the Ant Species: Some ant species are more beneficial than others. If they aren’t causing significant damage, consider leaving them alone.
  • Safety: Always wear gloves and protective clothing when handling pesticides or other chemicals.
  • Pets and Children: Keep pesticides and other ant control products out of reach of children and pets.  

By using a combination of these methods, you can effectively combat ants in your garden and protect your plants.