When it comes to hydrangeas, dealing with fungal diseases can be a common challenge. Luckily, there are several homemade fungicides that you can use to help combat these issues. One effective option is neem oil. Neem oil is derived from the seeds of the neem tree and has natural antifungal properties. To make a homemade fungicide using neem oil, you can mix 2 tablespoons of neem oil with 1 gallon of water. Be sure to thoroughly mix the solution before applying it to your hydrangeas. This spray can help control common fungal diseases such as powdery mildew and black spot.
Another natural option is a bacterial fungicide that contains Bacillus subtilis. This type of fungicide is often sold under brand names like Serenade. Bacillus subtilis is a beneficial bacterium that helps suppress fungal diseases. It works by colonizing the surface of plants and creating a protective barrier against harmful fungi. To use this type of fungicide, simply follow the instructions on the product label. It is usually sprayed directly onto the foliage of the plant.
If you prefer to make your own homemade fungicide, you can try a baking soda spray. Baking soda is a common household ingredient that has been found to have antifungal properties. To make a baking soda spray for hydrangeas, mix 1 tablespoon of baking soda and 1 tablespoon of horticultural oil in a gallon of water. Stir the mixture well until the baking soda is fully dissolved. This spray can be used to control fungal diseases like powdery mildew and rust.
It’s important to note that while these homemade fungicides can be effective, they may not completely eradicate fungal diseases. They can help suppress the spread of the disease and provide some relief for your hydrangeas, but it’s also important to practice good cultural practices to prevent further infections. This includes ensuring proper watering, providing adequate air circulation, and avoiding overhead watering.
In my personal experience, I have found neem oil to be quite effective in controlling powdery mildew on my hydrangeas. I usually apply the neem oil spray every 7-10 days, starting in early spring and continuing throughout the growing season. This has helped keep the fungal disease in check and allowed my hydrangeas to thrive.
Using homemade fungicides can be a great way to combat fungal diseases on hydrangeas. Whether you choose neem oil, a bacterial fungicide, or a baking soda spray, it’s important to apply the spray thoroughly and regularly to ensure the best results. Additionally, be sure to monitor your plants closely and take action at the first sign of any fungal diseases to prevent further spread.
