Any garden is susceptible to pests. Many people use chemical pesticides to control the problem, but they aren't always effective against all types of pest. Those who want a more natural approach can use a homemade pepper spray. Hot peppers contain a chemical that naturally repels insects and mammals. With just a few common ingredients, you can make an effective repellent that is safe for you, your plants and the environment.
Combine 3 garlic cloves, 1 tbsp ground cayenne pepper, half of a small onion and a half-gallon of water in a blender. Depending on the size of your blender, you may only be able to fit a portion of the mixture in at a time.
Blend the mixture on high speed for 45 seconds until it has a thin consistency.
Pour the mixture into a sealable container and let it sit for two days. During this time, the water will absorb the chemicals and scents from the other ingredients.
Pour the mixture through a sieve to separate the liquid from the solid material. You can choose to discard the solid material or save it to sprinkle around your garden for extra protection.
Fill an empty spray bottle with the liquid. Depending on the size of the bottle, you may need to use more than one bottle.
Spray the liquid directly on the plants. A light mist over the leaves and stem is all that is necessary. Reapply the liquid once per week to keep the spray effective. The spray should also be applied after rainfall as the rain will wash it away.