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Spiders do stay away from walnuts, and there’s a surprising reason why.
The green husks, leaves, and shells of black walnuts contain a natural compound called juglone that spiders strongly dislike.
So if you’ve been wondering, “do spiders stay away from walnuts,” the short answer is yes, they generally do.
In this post, we’ll explore why spiders stay away from walnuts, how you can use walnuts to keep spiders away, and what to keep in mind while doing it.
Let’s dive in.
Why Spiders Stay Away From Walnuts
Spiders stay away from walnuts because of the natural chemicals walnuts release, especially juglone.
Here’s a closer look at the reasons behind this.
1. Juglone Is a Natural Repellent
The biggest reason spiders stay away from walnuts is juglone.
Juglone is a chemical compound found mostly in black walnut trees, especially in their green husks, roots, leaves, and shells.
It’s toxic to many insects and arachnids, and spiders seem to sense this and steer clear.
When spiders stay away from walnuts, it’s largely because juglone acts as a natural pesticide that their bodies can’t tolerate.
2. The Strong Scent Overwhelms Spiders
Walnuts, particularly the husks and leaves, give off a strong, earthy scent.
Spiders rely heavily on scent and touch to navigate their environment, so this overpowering smell disrupts them.
That’s another reason spiders stay away from walnuts since the scent basically acts as a warning sign.
3. Walnut Oils Irritate Spider Bodies
The oils inside walnut husks and shells can irritate a spider’s exoskeleton and sensory organs.
When spiders stay away from walnuts, they’re avoiding surfaces that could harm them.
This irritation makes walnuts an effective natural barrier that spiders won’t cross if they can help it.
4. Spiders Instinctively Avoid Juglone-Rich Plants
Spiders have evolved to avoid plants and materials that contain juglone.
Since black walnut trees produce juglone, spiders stay away from walnuts and anything surrounding those trees.
This instinctive avoidance is why you rarely see spiders building webs near walnut trees or walnut shells.
How to Use Walnuts to Keep Spiders Away
Now that you know spiders stay away from walnuts, here’s how to actually use them around your home.
1. Scatter Walnut Shells in Corners
Place crushed walnut shells in corners, basements, garages, or any spot where spiders tend to gather.
The shells release small amounts of juglone over time, and spiders stay away from walnuts used this way.
Replace them every few weeks to keep the effect strong.
2. Make a Walnut Husk Spray
Boil walnut husks in water, let the mixture cool, then strain it into a spray bottle.
Spray this around windowsills, doorframes, and cracks where spiders might enter.
Since spiders stay away from walnuts, this natural spray works as a chemical-free repellent.
3. Place Walnut Leaves Near Entry Points
Fresh or dried walnut leaves can be placed near doors, windows, and vents.
Spiders stay away from walnuts and their leaves because both contain juglone.
Just remember to swap the leaves out as they dry and lose potency.
4. Combine Walnuts With Other Natural Repellents
For extra protection, pair walnuts with other spider-repelling items like peppermint oil, vinegar, or citrus peels.
When spiders stay away from walnuts, they’ll also be repelled by these complementary scents.
This layered approach keeps spiders from finding a way back inside.
Things to Keep in Mind When Using Walnuts for Spiders
Walnuts are a great natural option, but there are a few things to watch out for.
1. Juglone Can Harm Some Plants
Juglone doesn’t just affect spiders; it can also harm certain plants and garden vegetables.
So when you use walnuts to make spiders stay away from walnuts, keep them away from sensitive plants like tomatoes and peppers.
2. Keep Walnuts Away From Pets
Walnuts, especially black walnuts, can be toxic to dogs and horses if eaten in large amounts.
If you’re scattering walnuts to keep spiders away, place them where your pets can’t reach them.
3. Walnuts Work Best as Prevention
Walnuts help keep spiders away before they settle in, but they won’t wipe out a heavy infestation.
For serious spider problems, combine walnuts with regular cleaning and sealing cracks around your home.
4. Results Take Time
Spiders stay away from walnuts gradually, not instantly.
Give the juglone time to build up in the area, and you’ll notice fewer spiders over the coming weeks.
So, Do Spiders Stay Away From Walnuts?
Spiders do stay away from walnuts, thanks to juglone and the strong natural compounds found in walnut husks, leaves, and shells.
Whether you scatter shells, spray husk water, or place walnut leaves near entry points, spiders stay away from walnuts used in these forms.
Just be mindful of pets and sensitive plants while putting this natural repellent to work.
Hope this post has helped you understand why spiders stay away from walnuts and how to use them around your home.