Powdery mildew and black spot are common garden diseases and one of the most common home remedies is a mixture known as the ‘Cornell Formula’, a mixture whose main ingredient is baking soda.
This is an example of how and why myths get started.
In this post I will discuss the Cornell Formula, explain how it got started, and have a look at the efficacy of using baking soda as a DIY fungicide. Does it work? Will it harm your plants? Are there better options?
