Do Walnuts Really Keep Spiders Away

Walnuts can help keep spiders away, but they aren’t a magical overnight fix.
 
If you’ve been wondering, “do walnuts really keep spiders away,” the short answer is yes, but with a few important caveats.
 
The key is a compound called juglone that’s naturally found in walnuts, especially in the green husks and shells.
 
Juglone is toxic to many insects and arachnids, so spiders tend to avoid areas where walnuts are placed or scattered.
 
This is why you’ll see people tucking walnut shells into corners, under beds, and along baseboards to keep spiders out.
 
In this post, we’ll look at why walnuts keep spiders away, how to use them properly, and what their real limits are.
 
Let’s get into it.
 

Why Walnuts Keep Spiders Away

Walnuts keep spiders away because of the juglone they contain, and here’s how that works.
 

1. Juglone Is a Natural Repellent

Juglone is a chemical compound that walnut trees produce to defend themselves against pests.
 
When spiders come into contact with it, it disrupts their nervous system and makes the area unpleasant or even harmful to them.
 
That’s the main reason walnuts keep spiders away in the first place.
 

2. The Scent Confuses Spiders

Spiders rely heavily on scent and touch to navigate the world.
 
The strong, earthy smell of walnut shells and husks interferes with their ability to detect prey or find comfortable hiding spots.
 
So walnuts keep spiders away because they make the environment feel unsafe and confusing.
 

3. Green Husks Are the Most Potent

If you have access to green walnut husks, those are the strongest option.
 
They contain the highest concentration of juglone, which is why freshly fallen walnuts with husks still attached work best.
 
Dried shells work too, but the effect is milder and fades faster.
 

4. It’s a Low-Toxicity Option

Compared to chemical sprays, walnuts are a gentle, low-toxicity way to deal with spiders.
 
They’re safe around kids and pets when used in small amounts, which makes them a popular choice for natural pest control.
 
That’s another reason walnuts keep spiders away without the harsh fumes of commercial repellents.
 

How to Use Walnuts to Keep Spiders Away

If you want to put walnuts to work against spiders, here’s how to do it right.
 

1. Place Walnut Shells in Corners

Crush a few walnut shells and tuck them into corners, behind furniture, and along baseboards.
 
Spiders like to travel along edges, so this is where walnuts keep spiders away most effectively.
 

2. Use Green Husks for Extra Strength

If you can get green husks, place them in small bowls or mesh bags near entry points.
 
Just be aware that green husks can stain surfaces, so put them on a plate or inside a container.
 

3. Refresh Them Regularly

Walnuts lose their potency over time as the juglone breaks down.
 
Replace your shells or husks every two to three weeks, especially in humid areas where they can get moldy.
 

4. Combine With Other Natural Repellents

Walnuts work well alongside other spider deterrents like peppermint oil, vinegar, and cedar.
 
Combining a few of these gives you a stronger defense, and walnuts keep spiders away as part of that bigger strategy.
 

Do Walnuts Really Keep Spiders Away All the Time?

Walnuts really keep spiders away, but they’re not a permanent solution on their own.
 

1. They Work Best as a Barrier

Walnuts are great at discouraging spiders from hanging around in specific spots.
 
They won’t wipe out an entire infestation, but they do reduce activity in treated areas.
 

2. Some Spiders Aren’t Bothered

Not every spider reacts the same way, and some species seem less affected by juglone.
 
So while walnuts keep spiders away in most cases, you may still spot a stubborn one now and then.
 

3. You Still Need to Seal Entry Points

Repellents only work if spiders can’t just walk right back in.
 
Caulk cracks, fix torn screens, and clear clutter so walnuts can do their job more effectively.
 

4. Address the Root Cause

Spiders come inside looking for food and shelter.
 
If you have other bugs around, spiders will follow, no matter how many walnuts you scatter.
 
So walnuts keep spiders away, but controlling their food source matters just as much.
 

So, Do Walnuts Really Keep Spiders Away?

Walnuts really keep spiders away thanks to the juglone inside their shells and husks.
 
The scent and toxicity make spiders avoid treated areas, especially when you use green husks and refresh them regularly.
 
Just remember that walnuts work best as part of a broader plan that includes sealing cracks, reducing clutter, and cutting off their food supply.
 
Used that way, walnuts can be a simple, natural tool for keeping spiders out of your home.