Wildwarden Spider Spray
This spray repels spiders and kills them on contact.
Peppermint essential oil is toxic to cats and can harm small dogs — avoid using in cat households or apply only in spaces pets cannot reach. Don't spray directly on houseplants or garden plants. Wash hands after use; citrus secondary oils (lemon, orange, grapefruit) can cause sun-sensitivity on skin. Vinegar can dull marble, granite, and waxed wood — on those surfaces, make a vinegar-free version (just water + soap + oils).
About this recipe
A peppermint-based household spray that repels spiders around baseboards and windowsills and kills them on contact when sprayed directly. You pick the secondary oil based on what you have.
Ingredients
- 6 oz (180 ml) water (neutral base)
- 2 oz (60 ml) white vinegar — apple cider vinegar works too (acetic acid)
- ½ tsp dish soap or liquid castile soap — optional, see note belowPlant-based cleanser — supports Skin
- 25 drops peppermint essential oil (menthol)Mental clarity & focus — supports Mind & Cognition · Digestive · Pain & Inflammation · Skin
- 15 drops of your secondary oil — see 'Pick your secondary' below
Method
- 1 Pour the water and vinegar into an 8 oz spray bottle, leaving room at the top.
- 2 If using soap: add the dish soap and gently swirl — don't shake yet, you'll foam it.
- 3 Add the peppermint essential oil and 15 drops of your chosen secondary oil.
- 4 Cap and shake well before each use (the oils separate as it sits).
- 5 **To repel:** Spritz baseboards, windowsills, doorframes, corners, behind furniture, around vents, and basement and garage entry points. Reapply weekly, or after cleaning.
- 6 **To kill on contact:** Spray directly on the spider. With soap, they suffocate within a minute or two. Without soap, the vinegar and oils still kill them — it just takes a bit longer.
What you'll notice
- Repels and kills spiders without commercial pesticides
- Doubles as a deterrent for ants, silverfish, and roaches
- Peppermint's menthol is the most research-supported spider repellant — they smell through receptors on their legs and strongly avoid it
- Works even without soap — vinegar and essential oils alone will kill on contact, just more slowly
- Soap is a speed booster: it breaks down the spider's waxy cuticle so they suffocate faster
Tips & storage
**No castile soap or dish soap? That's okay.** The vinegar and essential oils on their own still kill spiders on contact — the kill just takes a minute or two longer instead of seconds. Field-tested with a soap-free vinegar + tea tree spray. The soap is a speed booster, not the active ingredient. **Pick your secondary oil (15 drops)** — any of these work, choose based on the scent you like and what the spray needs to do alongside spider duty: **Tea tree** (clean, slightly medicinal — very effective, plus antimicrobial so the bottle doubles as a surface cleaner; pick this for one-spray double duty). **Lemon** (bright, clean, universally pleasant — strong via limonene, cheap and common; pick this for the most universally pleasant scent). **Orange or grapefruit** (sweeter, fruitier citrus, slightly gentler — pick this for kitchens and bedrooms). **Eucalyptus** (fresh, camphorous, spa-like — strong repellant, also pushes back on ants and mites; pick this to deter other crawling pests too). **Lemongrass** (bright lemony-grassy, very effective, less skin photosensitivity than actual lemon — pick this for porches and entryways). **Citronella** (distinctly outdoorsy — very effective but polarizing, great for garages, sheds, and porches; usually too much for indoors). **Rosemary** (herbal, savory — moderate on spiders, strong on ants and silverfish; pick this for kitchen baseboards and pantries). **Lavender** (soft, floral — the mildest of the group on spiders but real, and pleasant for bedrooms and closets). **Don't have a spray bottle?** Use a rinsed-out cleaning spray bottle (label it!), a repurposed hair-mist or beauty bottle, or a small pump bottle from the dollar store.
Store in a cool, dark place. Shake well before each use. Best used within 6 months — essential oils lose potency over time.