---
product_id: 502106898
title: "STEM Kills Flies, Mosquitoes and Gnats: Plant-Based Active Ingredient Bug Spray, Botanical Insecticide for Indoor and Outdoor Use; 12 oz"
brand: "Stem"
price: "103 zł"
currency: PLN
in_stock: true
url: https://www.desertcart.pl/products/502106898-stem-kills-flies-mosquitoes-and-gnats-plant-based-active-ingredient
store_origin: PL
region: Poland
---

# STEM Kills Flies, Mosquitoes and Gnats: Plant-Based Active Ingredient Bug Spray, Botanical Insecticide for Indoor and Outdoor Use; 12 oz

**Brand:** Stem
**Price:** 103 zł
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** STEM Kills Flies, Mosquitoes and Gnats: Plant-Based Active Ingredient Bug Spray, Botanical Insecticide for Indoor and Outdoor Use; 12 oz by Stem
- **How much does it cost?** 103 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/502106898-stem-kills-flies-mosquitoes-and-gnats-plant-based-active-ingredient)

## Best For

- Stem enthusiasts

## Why This Product

- Trusted Stem brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

The best defense against Mother Nature is Mother Nature. Introducing STEM Kills Flies, Mosquitoes and Gnats – a bug spray for home and outdoor use made with botanical extracts that are deadly for bugs. STEM's scientists decode the power of nature to use botanical extracts to effectively and safely protect your family, home and pets from pests (when used as directed).STEM plant-based active ingredient bug spray is formulated with botanical extracts to kill flies, mosquitoes and gnats. Our insecticide is safe for use around kids and pets (when used as directed). It has no added dye, fragrance, or harsh chemical odors and is made for indoor and outdoor use. This bug spray safe for use around kids and pets (when used as directed) was tested by entomologists.​STEM helps protect your family. Rooted in Nature, Optimized by Science.   Bug spray kills flies, mosquitoes and gnats  Plant-based active ingredient bug killer safe for use around kids and pets (when used as directed)  Entomologist tested spray made with botanical extracts to kill bugs; with fresh scent and no added dye, fragrance, or harsh chemical odors  Bug killer for indoor and outdoor use, wherever bugs try to bother you​  Rooted in Nature, Optimized by Science

## Images

![STEM Kills Flies, Mosquitoes and Gnats: Plant-Based Active Ingredient Bug Spray, Botanical Insecticide for Indoor and Outdoor Use; 12 oz - Image 1](https://i5.walmartimages.com/asr/20d795e0-aca5-4241-a150-bdca98213cc4.f27c690d002acdff7c25dde51f5714f5.jpeg)
![STEM Kills Flies, Mosquitoes and Gnats: Plant-Based Active Ingredient Bug Spray, Botanical Insecticide for Indoor and Outdoor Use; 12 oz - Image 2](https://i5.walmartimages.com/asr/d7c6137e-0700-46ff-a240-0958450dad47.9176aa10b6d00f640b7d3d1247534125.jpeg)
![STEM Kills Flies, Mosquitoes and Gnats: Plant-Based Active Ingredient Bug Spray, Botanical Insecticide for Indoor and Outdoor Use; 12 oz - Image 3](https://i5.walmartimages.com/asr/8282af64-91da-41e7-a864-56b10e0cc010.42cdba2e1e875713dd20092e819dd605.jpeg)
![STEM Kills Flies, Mosquitoes and Gnats: Plant-Based Active Ingredient Bug Spray, Botanical Insecticide for Indoor and Outdoor Use; 12 oz - Image 4](https://i5.walmartimages.com/asr/218fe5fb-d101-4544-833e-19b3c910b146.5d74c15454128503e1151e1a1faf0a85.jpeg)
![STEM Kills Flies, Mosquitoes and Gnats: Plant-Based Active Ingredient Bug Spray, Botanical Insecticide for Indoor and Outdoor Use; 12 oz - Image 5](https://i5.walmartimages.com/asr/38d98f19-d578-418f-97fa-0f9944de6ba5.bc872c8084a26561432c10a3bec977f2.jpeg)

---

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**Shop now:** [https://www.desertcart.pl/products/502106898-stem-kills-flies-mosquitoes-and-gnats-plant-based-active-ingredient](https://www.desertcart.pl/products/502106898-stem-kills-flies-mosquitoes-and-gnats-plant-based-active-ingredient)

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-03-13*