Homemade Spider Killer – Cheap, Easy, and Effective

Learn how to make your own homemade spider killer without spending a fortune or using harmful chemicals.
Phyllis McMahon
Phyllis McMahon
Research Writer
Phyllis teaches English Literature at a local college and loves writing in her free time. She’s also a great cook – her British beef Wellington is something the best res read more
Reviewed By
Chas Kempf
Chas Kempf
Expert Consultant
Chas works in a professional pest control company and knows all the nuances of this job. Also, he’s a fantastic tennis player and loves to organize BBQ parties for his fam read more
Last updated: August 25, 2023
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Humans have such a love-hate relationship with spiders. While yes, we acknowledge that they benefit us by eating insects that would otherwise be in our house, we also don’t want these creepy crawlers running around. If you’re tired of spraying your house with toxic commercial killers, then maybe you should consider a homemade spider killer that won’t break the bank and harm your health.

And just for the record, we’re not talking about a convoluted contraption that’s more complicated than rocket science. We’re talking about sprays that you can make yourself at home using ingredients that you probably already have in your cupboard. If not, the materials you need are inexpensive and only require a small amount per recipe.

Keep in mind that your mileage may vary depending on what you use and what kind of spider is in your house, so don’t get discouraged if it doesn’t work right away. Keep trying until you find one that works for you.

Homemade Spider Killer: DIY

Creating your own homemade spider spray is easy, and more importantly, cheap. Most of them are water-based so the only things you need to pay for are the bottles and the oils. The other remedies don’t even require any mixing; you simply use the item as is.

One thing to keep in mind when making a homemade spider spray killer is to use a glass sprayer bottle instead of plastic. That’s because the essential oils degrade the plastic; the last thing you want is to clean a puddle of spider killer solution. Glass bottles don’t break down and the scent doesn’t stick on them, should you choose to repurpose the bottle into something else later.

White Vinegar

Homemade Spider Killer - Cheap, Easy, and EffectiveTopping this list is a solution that requires something most households already have: white vinegar. If you cook a lot or do a lot of natural cleaning in your home, then you’re halfway there. The recipe isn’t complicated either; all you need to do is mix equal parts water and vinegar into your sprayer. That’s it!

The only downside is your house might end up smelling of vinegar. Diluting it with water should help with the smell. However, if you have a particularly sensitive nose, a homemade spider killer with vinegar may not be for you.

Essential Oils

Homemade Spider Killer - Cheap, Easy, and EffectiveThe essential oils market has exploded in popularity over the last few years, and it’s easy to see why. They have lots of uses, one of which is for killing or repelling spiders. The most common recipes require either cinnamon oil, peppermint oil, or sometimes lavender oil. In fact, the use of peppermint oil against spiders became so prevalent that scientists performed a study in 2017 to assess whether it’s truly effective or not. Once the results were in, they found that peppermint oil really does repel spiders.

Diatomaceous Earth

Homemade Spider Killer - Cheap, Easy, and EffectiveUnlike the previous two materials mentioned, diatomaceous earth (or DE for short) is not something you’d mix with water. Instead, you spread it around the areas where spiders are most active or most likely to stay. That’s because any critter coming into contact with DE gets dehydrated from the inside out.

If you’re wondering what DE is, it’s a powder made from fossilized algae that’s completely natural and perfectly safe for humans. In fact, WebMD cites it as a good source of silica for the treatment of high cholesterol and constipation. If you want to try incorporating it into your diet while also using it as a spider killer, make sure you get something that’s both food-grade and organic.

Cedar Oil

Homemade Spider Killer - Cheap, Easy, and EffectiveCedar oil, also known as cedar wood oil, is another naturally occurring oil that spiders don’t like. Creating a spray out of cedar oil is an excellent repellent not just for spiders but also for other bugs and insects. Even the EPA acknowledges its effectiveness against bugs as it is a popular ingredient in other repellent products. It’s even safe enough for use on pet collars to aid in preventing ticks and fleas. That’s how you know it’s been proven to be effective.


Homemade Spider Killer - Cheap, Easy, and EffectiveIf you already like chestnuts then this one is for you. Did you know you can place chestnuts along your windows and doorways to keep spiders away? That’s because spiders hate the sap from the chestnut – called saponin – and are driven away by it. What’s more, the same researchers who tested peppermint oil earlier also tested the efficacy of chestnuts; they found it to be effective at repelling spiders.

Hedge Apples

Homemade Spider Killer - Cheap, Easy, and EffectiveHere’s another material that you won’t see as an ingredient in any homemade spider spray recipe: hedge apples. These inedible fruits are actually a bit of a misnomer as they grow from the Osage orange tree. And no, the fruits aren’t orange either – they’re green. There’s no need to be confused though because you can place these fruits around the foundation of your house to drive creepy crawlers away.

However, researchers from Iowa State University found inconclusive results about the fruit’s effect on spiders. Keep in mind that they only performed their tests on whole fruits instead of using sliced ones. Slicing the fruits and placing them strategically around the perimeter of your house might be worth trying. For even better results, use them alongside some of the best traps for spiders to make sure you don’t miss anything.


Homemade Spider Killer - Cheap, Easy, and EffectiveThe use of citrus against spiders seems to be a divisive topic depending on who you ask. Those who share how to make homemade spider killers swear by the usefulness of citrus, while the scientific community says otherwise. The same researchers who tested peppermint oil and chestnuts also used citrus – lemon oil in particular. Unlike most people, they found lemon oil to be ineffective. Your mileage may vary if you do decide to try lemon oil or other citrus-based solutions for yourself.

Homemade Spider Spray

If you’ve ever found yourself wanting to rid your house of spiders, your first thought probably would’ve been to run to the store and grab the best foggers for spiders. While that’s a rational decision, did you know it’s cheaper and safer in the long run to make the homemade spider spray killer yourself? All you need is a glass bottle, your ingredient of choice (vinegar, essential oils, cedar oil), and some water to get you going.

Homemade Spider Killer - Cheap, Easy, and EffectiveWhere to Spray It

The first places you should be spraying are the areas where spiders can enter – around your door and door frame; your windows; corners of the wall; any cracks and crevices; and even around the register. Basically, if it’s an entrance from the outside and a spider can fit through it, spray it. Make sure to respray the surfaces every few days until you’re sure that all spiders are gone.

Be careful, however, if you decide to use your homemade spider mite killer for house plants. Peppermint oil, in particular, should not be used if you have pets that may chew on the leaves or kids who might touch them. Essential oils should never be ingested so keep this in mind.

How Often to Use It

How often you use your homemade spider spray killer indoors depends on how many spiders you have and how much you like the scent. If you have quite a lot of spiders around, spraying two to three times a week for the first few weeks might be beneficial. You want to make sure you kill or repel any existing ones inside your house and deter them from coming back.

However, if your spider problem is light or if you just want to make sure they stay outside, once a week is likely enough. As long as you’re diligent in spraying any potential entrances, you can be sure that spiders won’t be back anytime soon. You even get to enjoy the added benefit of your house smelling nice, thanks to the scent of the essential oils. That’s a win-win situation!

Outdoor Use

Homemade Spider Killer - Cheap, Easy, and EffectiveHere’s an added bonus for you: your homemade spider spray can also be used outdoors. Most people are happy with keeping the spiders outside as long as they don’t enter, but there’s nothing wrong with completely banishing them from your property. Depending on which essential oil you use, your spray can also repel other pests such as mosquitoes and bedbugs. Sprays made from cedar oil are particularly effective in keeping pests outside when sprayed on the outside perimeter of the house.

You can even use your homemade spider mite killer for weed plants! In fact, scientists found in 2018 that peppermint oils, when combined with winter savory, “constitutes an eco-friendly and less pernicious alternative to weed control.” Talk about a 2-in-1 benefit from the same homemade solution.

There’s a downside to using your homemade spider spray killer outdoors: it repels all sorts of insects indiscriminately. While the solution works well to keep undesired insects out, it can also drive away helpful ones such as ladybugs. If you’re looking to target spiders specifically, consider using one of the best outdoor spider sprays instead.


Several studies have been conducted to prove the effectiveness of these sprays, not to mention the number of testimonials from those who used them over the years. These sprays and solutions have been proven to work, but it’s up to you to pick which one is best for your situation.

For example, if you or someone in your household has respiratory problems, you probably should not use DE as it comes in a form of fine dust. If you can’t stand the smell of vinegar but love the smell of cedar oil, then you should make your homemade spider spray out of cedar oil instead. Always remember that you’re making these sprays to benefit you and your family, so always choose the safest and most beneficial option for your needs. That’s the point of creating them yourself, after all.

How to Make Homemade Spider Killer: Recipe

We’ve been talking about using these homemade spider killers but we’ve never actually mentioned how to make them; you’d be surprised at how easy the process is. For example, vinegar-based sprays only need equal parts water and vinegar. Some people add a drop of dish soap and pepper into the solution, so feel free to add them at your discretion.

Meanwhile, homemade spider spray recipes that use essential oils are just as easy to make. First, fill your spray bottle with water. Then put 10-15 drops of your chosen oil into the bottle and mix well. Add a few more drops if you think you need a stronger solution.

Now that you know how easy they are to make, there’s no need for you to buy premade solutions online.

Homemade Spider Mite Killer

Homemade Spider Killer - Cheap, Easy, and EffectiveHere’s something you may not have heard before if you don’t have plants in or around your house: spider mites. Though much smaller than the spiders we’re used to, these spider mites congregate on the underside of plant leaves. They bite onto the leaves and suck the nutrients away from the plant.

Getting rid of these pests are crucial if you want to save your plants; thankfully, homemade spider mite killers for house plants will handle them just fine. But there’s a catch: if you’re trying to treat something you’ll be eating, you shouldn’t use essential oils for your spray.

If you’re only treating decorative plants, you have a few more options at your disposal. One way is to mix equal parts water and rubbing alcohol onto a spray bottle. This homemade spider mite killer with alcohol works immediately; it kills spider mites on contact. Another option calls for the addition of dish soap into the solution, which traps and suffocates the pests.

Whichever spray you end up using on your plants, make sure you reapply every few days until the infestation is cleared. Make sure you clear their web just to make sure you don’t have any stragglers trying to stay behind.

What Attracts Spiders in the House?

Spiders usually don’t enter the house maliciously; they do so because they think they can feed themselves there. Because spiders like bugs and insects, it’s a hint that your house may have a bug or insect problem as well. Maybe spiders are really just trying to help, after all?

Prevention is always better than the cure, so here are some steps you can take to prevent them from entering (or re-entering) your house:

  • Seal any cracks on your walls – a crack on the wall is likely to indicate a larger problem, so check to make sure it’s not a sign of a more serious issue. Regardless, you should seal any cracks using caulk to stop any pests from entering through it.
  • Use fewer lights, especially during warmer evenings – if you’ve ever sat outside during a particularly warm evening, you’ve probably noticed a bunch of flying insects congregating around bright lights. For spiders, this is practically an all-you-can-eat buffet.
  • Regularly vacuum your house – some insects have a habit of hitching a ride through your shoes or clothes. A regular cleaning schedule should prevent any unwanted dirt or insects from joining you inside the house.
  • Keep clutter to a minimum – having too much stuff around gives all sorts of critters the opportunity to live without disruptions. Cellar spiders, for example, love living undisturbed in a quiet basement. Keep your clutter down and regularly clean around the house to make sure no insects or spiders are trying to live rent-free.

Final Thoughts

Getting rid of spiders in your house should neither be expensive nor poisonous. As you’ve learned, creating your own homemade spider killer is cheap and easy. Not only are they non-toxic but they also smell good as well. They can also be used for other purposes. Always avoid trying to use commercial insect killers; your body and the environment will thank you.

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