Could you be more specific? What are your plants and what kind of bugs? Need more info so you can get the answers you need.
If you are talking about vegetable plants, you could Google "companion plants" and see what to plant with your existing plants that will naturally repel pests.
An example is if you already have tomatoes planted and they are being invaded by pests, add in marigolds as a natural repellant.
Try these: https://www.angieslist.com/articles/insects-bugging-your-plants-try-these-10-natural-insecticides.htm
If you use any pesticide (even organic) those will kill both the good bugs and the bad bugs, including pollinators which we need. There is some helpful information in this article about dealing with pests in your gardens. Good luck! https://ginghamgardens.com/dealing-with-garden-pests/