Do Walnuts Really Repel Spiders

Walnuts do not repel spiders.
 
There’s no scientific evidence that walnuts, or any part of them, drive spiders away.
 
If you’ve been asking yourself “do walnuts really repel spiders,” you’re not alone.
 
This is one of those home remedies that sounds good in theory but falls apart under scrutiny.
 
In this post, we’ll look at where the claim comes from, what science says about whether walnuts repel spiders, and what actually works to keep spiders out.
 
Let’s dig in.
 

Where the Idea That Walnuts Repel Spiders Came From

The idea that walnuts repel spiders probably started as an old wives’ tale passed around kitchens and gardens.
 
Some folks claim that placing walnuts in corners, near windows, or along baseboards keeps spiders away.
 
Others say that walnut leaves, walnut hulls, or even crushed walnut shells have the same effect.
 
The theory is that walnuts contain juglone, a natural compound that can be toxic to certain plants and insects.
 
Because juglone is a known toxin for some organisms, people assumed it must also repel spiders.
 
But that’s a big leap that doesn’t hold up when you actually look at the evidence.
 

What Science Says About Walnuts Repelling Spiders

When you ask “do walnuts really repel spiders,” science gives a pretty clear answer: no.
 
There is no peer-reviewed study showing that walnuts, walnut oil, or walnut hulls repel spiders.
 
Juglone is indeed toxic to some plants and a few insects, but spiders are not insects.
 
Spiders are arachnids, and their physiology is different enough that juglone doesn’t affect them the same way.
 
Even if you crush a pile of walnuts and leave them in a corner, spiders will happily walk right past them.
 
The only thing you’ll get is a mess of rotting nut shells and maybe a few pantry moths.
 

1. No Repellent Compounds in Walnuts Target Spiders

For a substance to repel spiders, it needs to trigger an avoidance response.
 
Things like peppermint oil, citrus, and vinegar have shown some repellent effects in limited studies.
 
Walnuts don’t contain any compound that spiders find irritating or dangerous.
 
Juglone might deter certain beetles or worms, but spiders simply aren’t bothered by it.
 

2. Spiders Aren’t Affected by Juglone the Way Insects Are

Juglone works by disrupting cellular respiration in specific organisms.
 
Spiders have different metabolic pathways, so the compound doesn’t have the same impact.
 
That’s why you’ll still see spiders building webs near walnut trees or in baskets of walnuts.
 
If walnuts really repel spiders, you’d never find a spider anywhere near a walnut tree, and that’s just not the case.
 

3. Anecdotal Claims Don’t Hold Up

Some people swear that walnuts repel spiders because they tried it and didn’t see spiders for a while.
 
But that’s likely coincidence, seasonal changes, or the fact that spiders are just good at hiding.
 
Spiders come and go based on food availability, weather, and mating cycles.
 
A few walnuts on the floor won’t change any of that.
 

What Actually Works to Keep Spiders Away

If walnuts don’t repel spiders, what does?
 
The good news is there are plenty of proven methods to keep spiders out of your home.
 
You just need to focus on the things that actually work.
 

1. Seal Cracks and Gaps

Spiders squeeze through tiny openings.
 
Caulk around windows, doors, and baseboards to cut off their entry points.
 
This is one of the most effective ways to reduce spiders indoors.
 

2. Reduce Clutter and Dust

Spiders love quiet, undisturbed corners.
 
Cardboard boxes, stacks of paper, and dusty shelves make perfect hiding spots.
 
Regular cleaning and decluttering give them fewer places to settle.
 

3. Use Natural Repellents That Actually Work

Peppermint oil, eucalyptus, and citrus sprays have shown some success in repelling spiders.
 
You can mix a few drops of essential oil with water and spray it along baseboards and windowsills.
 
Just remember that these need to be reapplied often, and they’re not a cure-all.
 

4. Turn Off Outdoor Lights at Night

Outdoor lights attract insects, and insects attract spiders.
 
Switch to yellow bug bulbs or turn off exterior lights when you don’t need them.
 
Fewer bugs means fewer spiders hanging around your doorways.
 

5. Call a Professional for Serious Infestations

If you’re dealing with a lot of spiders, a pest control expert can help.
 
They’ll identify the species, treat the problem, and give you tips to prevent them from coming back.
 
This is especially important if you suspect venomous spiders like black widows or brown recluses.
 

So, Do Walnuts Really Repel Spiders?

Walnuts do not repel spiders.
 
There’s no scientific backing for the claim, and the idea that juglone drives spiders away simply doesn’t hold up.
 
If you want to keep spiders out, focus on sealing entry points, reducing clutter, and using repellents that have actually been shown to work.
 
Save your walnuts for baking and snacking, not for pest control.
 
And if someone tells you that walnuts repel spiders, you can kindly let them know that’s one nutty myth that doesn’t crack under pressure.