This post contains affiliate links. As an Amazon Associate I earn from qualifying purchases. If you click a link and make a purchase, I may receive a small commission at no extra cost to you.
Walnuts do not scare away spiders.
There’s no scientific evidence that walnuts repel spiders, and placing them around your home won’t keep eight-legged visitors out.
If you’ve been asking yourself “do walnuts scare away spiders” after seeing a viral tip online, you’re not alone.
It’s a popular myth that walnuts, especially green or black walnut husks, can drive spiders away because of their strong scent or natural compounds.
The truth is that walnuts won’t scare away spiders, though some people believe the smell of walnut husks works as a spider repellent.
In this post, we’ll explore why walnuts don’t scare away spiders, what actually works to keep them out, and whether there’s any grain of truth to the walnut myth.
Let’s dig in.
Why Walnuts Don’t Scare Away Spiders
Walnuts don’t scare away spiders, and here’s why that myth doesn’t hold up.
1. Spiders Don’t React to Walnut Scent
Spiders rely on vibrations, air currents, and contact pheromones to sense the world around them.
Their sensory systems aren’t wired to detect or avoid the aroma of walnuts.
So even if you scatter walnut shells around your windowsills, spiders won’t perceive them as a threat.
That’s why walnuts don’t scare away spiders in any meaningful way.
2. Juglone Doesn’t Repel Spiders
Green walnut husks contain a compound called juglone, which is toxic to some plants and insects.
People assume this same compound must repel spiders too.
But juglone’s effects are specific to certain plants and a handful of insects, not arachnids.
There’s no research showing juglone or any walnut compound scares spiders away.
So using walnuts as a spider deterrent just isn’t backed by science.
3. The Myth Came from Anecdotes, Not Evidence
The idea that walnuts scare away spiders likely spread through word of mouth and social media.
Someone probably noticed fewer spiders in a room that happened to have walnuts and assumed the nuts were the reason.
But correlation isn’t causation, and no controlled study has ever confirmed that walnuts repel spiders.
That’s the story behind why walnuts don’t scare away spiders.
What Actually Keeps Spiders Away
Since walnuts won’t scare away spiders, here are methods that genuinely work.
1. Peppermint and Citrus Oils
Spiders do seem to avoid strong essential oils like peppermint, citrus, and tea tree.
These scents overwhelm their senses, so they’ll steer clear of treated areas.
Mix a few drops with water in a spray bottle and apply it along baseboards and entry points.
This is far more effective than hoping walnuts will scare away spiders.
2. Vinegar Spray
White vinegar is another natural option that spiders dislike.
Spray it in corners, windowsills, and doorways to create a barrier they won’t cross.
Unlike walnuts, vinegar actually has proven repellent qualities.
So if you want to scare away spiders, skip the nuts and grab the vinegar.
3. Seal Cracks and Gaps
The most reliable way to keep spiders out is to block their entry points.
Caulk cracks around windows, doors, and foundations, and repair torn screens.
Spiders can squeeze through tiny spaces, so this step matters more than any homemade repellent.
No amount of walnuts will scare away spiders if they can still walk right in.
4. Declutter and Dust Regularly
Spiders love quiet, cluttered corners where they can build webs undisturbed.
Regular dusting and vacuuming removes webs and egg sacs while making your home less appealing.
Keep storage areas tidy and reduce cardboard piles that attract insects, which in turn attract spiders.
This approach works far better than scattering walnuts around hoping they’ll scare away spiders.
5. Use Cedar and Chestnut Blocks
Cedar and horse chestnut are old-school spider deterrents with some anecdotal support.
Place these blocks in closets, basements, and garages where spiders tend to gather.
They’re still not scientifically proven, but they beat walnuts when it comes to scaring away spiders.
Do Walnuts Have Any Pest-Control Value at All?
Walnuts don’t scare away spiders, but they do have other uses around the home.
1. Walnut Husks as Natural Dye
Black walnut husks make a rich brown dye used for fabric and wood staining.
That’s a genuine use for walnuts, just not one that involves spiders.
2. Walnut Shells for Abrasive Cleaning
Crushed walnut shells are used in sandblasting and as a mild abrasive in cosmetics.
Again, useful, but not related to scaring away spiders.
3. Walnuts as Food, Not Repellent
Let’s be honest, walnuts are best enjoyed as a snack or in baking.
They’re packed with omega-3s and antioxidants, which is a much better reason to keep them around.
So enjoy your walnuts, but don’t count on them to scare away spiders.
Common Mistakes People Make with Walnuts and Spiders
Believing walnuts scare away spiders can lead to some frustrating mistakes.
1. Relying on Walnuts Instead of Real Solutions
People place walnut halves in corners and wait, then wonder why spiders keep showing up.
Meanwhile, actual entry points stay open and clutter keeps piling up.
That’s the danger of trusting the walnut myth over proven methods.
2. Attracting Other Pests
Leftover walnut pieces can attract ants, rodents, and pantry moths.
So instead of scaring away spiders, you might end up with a bigger pest problem.
Always use sealed containers if you store walnuts, and never leave them scattered as a repellent.
3. Overlooking the Real Reason Spiders Are There
Spiders show up where there’s food, shelter, and moisture.
If you’ve got a spider issue, the fix is reducing other insects, sealing cracks, and lowering humidity.
Walnuts won’t address any of that, so they’ll never scare away spiders on their own.
So, Do Walnuts Scare Away Spiders?
Walnuts don’t scare away spiders.
There’s no scientific backing for the idea, and spiders simply don’t respond to walnuts or their compounds.
If you want to keep spiders out, stick with proven methods like peppermint oil, vinegar sprays, sealing gaps, and reducing clutter.
Save your walnuts for baking and snacking, because they won’t scare away spiders no matter how many you scatter around the house.