7. Coffee Grounds Barrier

Why it works: Coffee grounds repel insects and can be used as a natural perimeter barrier.

DIY Approach:

  • Sprinkle used coffee grounds around your garden or sitting area.
  • Replenish regularly to maintain the barrier.
  • This also deters other garden pests like ants and slugs.

Extra tip: Combine coffee grounds with crushed eggshells for added pest resistance.