Easy Homemade Fungicide Spray for Plants – Two Ingredients!!

This is something I have mentioned before on Chemistry Cachet, but haven’t done a full post on yet!
The best part? This is great for MORE than just preventing fungus and bacteria, be sure to read the chemist notes below to learn more.
Ingredients:
- 1 aspirin tablet 325 mg
- 1 gallon water
- Spray bottle (click blog post link at bottom of post for tips on choosing the right spray bottle!!)
- A few drops of dish soap (OPTIONAL)
Directions:
- Crush aspirin up until it is a fine powder.
- Mix with one gallon of water.
- Add contents to a spray bottle. At this point, you can add a few drops of soap if you choose too. PLEASE read notes below about the dish soap!!
- Using the mist setting, spray leaves of plant until lightly, but evenly coated.
- Use every few weeks during the growing season.
For More Aggressive Treatments:
I wanted to include a quick alternative solution for this. I have done quite a bit of research on using aspirin for plants. In a few horticulture books, the solution mentioned was 1 aspirin to 1 LITER of water. This makes it a little more concentrated, so if you want to really make sure your plant is protected from disease, you can use this ratio. I have used the 1 liter of water for my roses, and they responded well.
For more details on the science behind this spray, click here :)
Enjoyed the project?
Suggested materials:
- Aspirin (store)
- Water (home)
- Spray bottle (online)

Comments
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Alexis @ Chemistry Cachet on May 30, 2019
Hope you love it too!
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Lifestyles Homes on Jul 16, 2019
I’m looking for your scientific white paper reference for the efficacy of this solution as an anti-fungal.
I’ve found white papers describing it as being effective on certain yeasts, but not as a solution of 1 aspirin: 1 gallon of tap water.
Thanks.
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Alexis @ Chemistry Cachet on Jul 16, 2019
You can click the blog link and get all the details https://chemistrycachet.com/easy-homemade-fungicide-spray-for-plants/
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Frequently asked questions
Have a question about this project?
Will it fix black spot on my roses?
Wut about using this solution for a window I have that sweats n molds. Would u use this also
Please respond. I need help. Thx.
will this work on Japanese beetles? They are eating the leaves of my snowball bush