12. Banish insects from the garden

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Here's how you can get rid of aphids without inhumane methods or toxic chemicals, and you won't need to use inhumane methods or toxic chemicals. Aphids are very common, as well as annoying, insects that take up residence in your garden without invitation. Put banana peels in a few 1-inch holes near the base of your aphid-infested plants, and the potassium will repel the little guys.