Cedar has a long-established reputation for repelling moths in wardrobes and storage, and we’ve seen cedar blocks recommended for pantry moths on a number of food storage guides and forums. We want to give you our honest assessment of whether cedar blocks for pantry moths actually work in a food storage context, since the answer is more nuanced than most of those recommendations suggest.
Why Cedar Has a Moth Reputation
Cedar wood contains natural oils, primarily cedrol and thujopsene, that have a repellent effect on certain moth species. This reputation is well-established and largely deserved in the context for which it was originally developed: cedar-lined wardrobes and blanket chests for clothes moths. Clothes moths are genuinely deterred by these compounds in significant concentrations.
The Problem When It Comes to Pantry Moths Specifically
Pantry moths — specifically the Indian meal moth that causes the vast majority of household food infestations — are a different species from clothes moths, and the evidence for cedar’s effectiveness against them specifically is considerably weaker. In our own experience and in our reading around the topic, cedar functions at best as a mild deterrent for pantry moths rather than a reliable control method. We’ve never managed to resolve or meaningfully reduce an active pantry moth infestation using cedar alone.
Where Cedar Blocks Might Genuinely Help
As a very light supplementary deterrent in a pantry where the main pest control measures are already properly in place — pheromone traps, airtight storage, and regular cleaning — cedar blocks might offer a small additional margin. They smell pleasant, they’re completely safe in a food storage environment, and they cost almost nothing. If cedar blocks for pantry moths encourage you to think about your pantry pest management more seriously, that indirect benefit has value even if the cedar itself doesn’t do much directly.
What Actually Works Instead
For the actual work of controlling pantry moths, we’d direct you toward the methods that have a genuine evidence base and that we’ve used with real success: pheromone traps as described in our guide on best pantry moth traps that actually work, properly airtight storage such as the Vtopmart container set, and the freezing protocol we cover in our guide on freezing food to kill pantry moth eggs. These address the actual biology of the moth lifecycle rather than just making your pantry smell of cedar.
Our Honest Verdict
Cedar blocks for pantry moths are mostly harmless and smell lovely but shouldn’t be relied upon as a real control measure. If you enjoy the scent and want to add them to a pantry that’s already properly protected by the methods above, go ahead — they’ll do no harm and may provide a very small supplementary deterrent effect. But if you’re dealing with an active infestation or trying to prevent one in earnest, cedar alone won’t be enough, and treating it as though it will be is likely to leave you disappointed.