By Tina, Founder of Zen Soul Studio

When summer heat and humidity rise, mosquitoes, midges, and ticks become far more active. Climate change is accelerating this, with warmer temperatures increasing insect feeding, reproduction, and survival. Research from the University of Washington highlights how warming conditions intensify insect pressure on both humans and ecosystems.

At Zen Soul Studio, I’m always looking for natural solutions that genuinely work — without adding to your toxic load. Conventional bug sprays rely on DEET, synthetic fragrance, and petroleum‑derived solvents. They’re effective, but they’re not gentle. Essential‑oil‑based repellents offer a safer alternative, and when formulated correctly, they can help keep mosquitoes and ticks at bay.

How Essential Oils Repel Bugs

Insects don’t find you by sight — they find you by chemistry. Mosquitoes and ticks track humans by detecting CO₂, heat, ammonia, lactic acid, and natural skin odours. This is well documented in vector‑biology research, including the NIH overview of mosquito and tick olfaction.

Essential oils contain volatile terpenes — aromatic molecules plants evolved to defend themselves. As these terpenes evaporate, they create a shifting scent cloud that masks your natural odour, scrambles insect olfactory cues, and interferes with heat and CO₂ detection.

This is why essential oils can be surprisingly effective when used correctly.

The Best Essential Oils for Mosquitoes & Ticks

(Founder‑led explanations + science)

Below is the full Zen Soul Studio list — the oils I trust, use, and recommend.

Lemon Eucalyptus (Eucalyptus citriodora)

One of the most reliable natural repellents. Its high citronellal content creates a sharp, lemony aroma that masks human scent and disrupts insect host‑seeking. Effective for: mosquitoes & ticks Study: https://pubmed.ncbi.nlm.nih.gov/24335673/

Geranium (Pelargonium graveolens)

Rich in geraniol, one of the strongest natural insect‑repellent molecules. Gentle on skin yet powerful, with proven activity against Aedes aegypti mosquitoes and Ixodes ticks. Effective for: mosquitoes & ticks Study: https://pubmed.ncbi.nlm.nih.gov/28487271/

Cedarwood Virginian (Juniperus virginiana)

A quiet powerhouse. Its warm, woody aroma comes from cedrol and thujopsene, compounds many insects instinctively avoid. Effective for: mosquitoes & ticks Study: https://pubmed.ncbi.nlm.nih.gov/20809661/

Thyme ct. Linalool

Scientifically impressive. A 2022 study showed 91% protection against Aedes albopictus. Effective for: mosquitoes & ticks Study: https://pubmed.ncbi.nlm.nih.gov/35054020/

Lemongrass (Cymbopogon flexuosus)

Bright, citrusy, and rich in citral and geraniol. Consistently effective in mosquito studies and helpful for deterring ticks. Effective for: mosquitoes & ticks Study: https://pubmed.ncbi.nlm.nih.gov/16291091/

Neem Oil (Azadirachta indica) — optional, adult‑only

Not an essential oil, but a powerful addition. A 2021 study showed 17.5% neem cream significantly reduced mosquito landings. A 2023 review found neem disrupts all life stages of mosquitoes due to azadirachtin. Effective for: mosquitoes (strong), ticks (moderate)

The Hidden Toxic Load in Conventional Bug Sprays

Most commercial repellents rely on DEET, permethrin, synthetic fragrance, and petroleum‑derived solvents. DEET can irritate skin and affect the nervous system at high exposure. Permethrin is an endocrine disruptor and highly toxic to aquatic life. Synthetic fragrances often contain phthalates linked to headaches, respiratory irritation, and hormone disruption.

At Zen Soul Studio, I always look at the cumulative load — what you’re exposed to daily. Natural essential‑oil‑based repellents offer protection without adding to this chemical burden.

How to Make a Safe, Effective Natural Bug Repellent

Zen Soul Studio Method

Essential oils never mix with water on their own. They’re lipids, so without support they float on the surface and sit on the skin in concentrated droplets — unsafe and ineffective.

Witch hazel won’t fix this. It’s mostly water, and the tiny alcohol content isn’t enough to emulsify anything.

If you prefer a natural solvent, use organic grain alcohol (95–96% food‑grade). It dissolves essential oils cleanly and creates a stable, even spray without preservatives.

For alcohol‑free blends, you need a true solubiliser such as Solubol or Polysorbate 20.

You can omit carrier oil, but adding a tiny amount of grapeseed or fractionated coconut oil (plus a few drops of Neem for adults) softens the spray and helps the scent last longer.

Alcohol‑Free Bug Repellent (100 ml)

Requires a true emulsifier — NOT witch hazel

Ingredients

15 drops Lemon Eucalyptus (Citriodora) 10 drops Rose Geranium 10 drops Thyme ct. Linalool or Rosemary (For tick‑focused blends: skip Thyme/Rosemary and add +5 drops Geranium) 8 drops Cedarwood Virginian 4–6 ml Solubol or Polysorbate 20 2–5 ml Grapeseed or Fractionated Coconut Oil (Optional: 3–5 drops Neem oil for adults) 93 ml distilled water (or top up to 100 ml)

Dilution Safety

Max 20 drops essential oils = 2% dilution Children: 0.5% dilution for extra caution 1% maximum for ages 2+ Apply to clothing, not skin, for under‑3s

How to Make It (Step‑by‑Step)

1. Combine the carrier oil with the emulsifier and mix until fully blended.

2. Add your essential oils and stir — this creates the base.

3. Add distilled water and shake until the mixture turns evenly cloudy.

4. Pour into a brown glass spray bottle.

5. Store in the fridge, out of sunlight, and use within four weeks.

6. Shake well before each use — emulsified blends still need a refresh.

Treatment for Bites

Even with the best repellents, bites happen. Peppermint and lavender help reduce itch, redness, and inflammation. Because bite treatment is applied to a small area, you can safely use up to 5% dilution for short‑term relief.

At Zen Soul Studio, I recommend a soothing balm with marshmallow root to calm, hydrate, and repair the skin — the final step in a natural bug‑care routine: repel → avoid → treat → repair.

More Recipes & Methods

For more natural bug‑repellent recipes, dilution charts, and safe formulation methods, you can download my full guide here:

How to Make Bug Repellents & What Really Works https://cdn.shopify.com/s/files/1/0901/9503/4435/files/How_to_repel_Bugs_-_GUIDE.pdf?v=1780433512