How to Use Copper Sulfate on Tomato Plants

Tomato plants are a favorite for many gardeners, but they are susceptible to diseases such as blight, which can quickly kill your plants. Copper sulfate is a common fungicide that can be used to treat and prevent blight on tomato plants. Here's how to use copper sulfate on your tomato plants.

What is Copper Sulfate?

Copper sulfate is a naturally occurring compound that is commonly used as a pesticide and fungicide. It is effective in controlling a wide range of fungal and bacterial diseases that can harm tomato plants, including blight.

When to Use Copper Sulfate on Tomato Plants

Copper sulfate is best used as a preventative measure against disease. It should be applied before the disease appears or at the very first signs of infection. Applying copper sulfate after the disease has taken hold may not be effective and could harm your plants.

How to Apply Copper Sulfate

Copper sulfate should be applied as a spray to the foliage of your tomato plants. Mix 1 tablespoon of copper sulfate in 1 gallon of water and pour the mixture into a pump sprayer. Spray the solution evenly over the entire plant, making sure to cover both the top and bottom of the leaves.

It is important to avoid getting the copper sulfate solution on the soil around your tomato plants, as it can harm beneficial microorganisms in the soil. If possible, cover the soil with plastic or newspaper before applying the spray.

Frequency of Copper Sulfate Application

To prevent disease, copper sulfate should be applied every 7-10 days throughout the growing season. If you notice signs of disease, increase the frequency to every 3-5 days until the problem is under control.

Other Tips for Preventing Tomato Plant Disease

In addition to using copper sulfate, there are other steps you can take to prevent disease in your tomato plants:

Plant disease-resistant varieties

Ensure your tomato plants are well-watered

Avoid overcrowding your plants

Clean up any dead or diseased leaves or fruit

Conclusion

Copper sulfate is an effective tool for preventing and treating disease in your tomato plants. By using it as a preventative measure and following the tips above, you can enjoy healthy, productive tomato plants all season long.