The answer to 'natural silverfish repellent' is to use a combination of natural deterrents around your home. Silverfish are attracted to moist, damp environments and feed on paper, starch, and other organic materials. By making your home less appealing to them, you can effectively repel silverfish without using harsh chemicals.
Some of the most effective natural silverfish repellents include diatomaceous earth, cedar oil, boric acid, and essential oils like peppermint, lavender, or tea tree oil. You can sprinkle diatomaceous earth in areas where silverfish are commonly found, such as behind baseboards, in cabinets, and under sinks. Cedar oil can be used to treat wood surfaces, while boric acid can be applied as a powder in cracks and crevices. Essential oils can be placed on cotton balls and strategically placed around the home.