Cedar repels moths if it has a strong enough odor. Look for it in the form of blocks, balls, hangers, or boxes and sand it with sandpaper every few months to revive the scent.

How long does cedar wood repel moths?

You can purchase cedar hangers, cedar blocks for moths, and sachets for your clothes and bureaus, but they will be effective for about 3 months.

Why do moths dislike cedar?

We now know that cedar’s insect-repelling power lies in the oil that infuses its wood. … These compounds, which make up 70 percent of Cedrus atlantica oil and are present in the oil of other cedar species, are likely responsible for most of the moth-deterring.