Is Vinegar Good for Tomato Plants?

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Vinegar can be beneficial for tomato plants.

Tomatoes are the most commonly grown vegetable in home gardens in America, according to the University of Illinois. Because tomatoes are naturally acidic, vinegar can be used as a natural fungicide as well as a fertilizer on these tasty and nutritious plants.


Vinegar is a natural substance that has a wide variety of uses. It is acidic, but not toxic, which means it is safe to consume. For that reason, it can be used on edible as well as non-edible plants without harming them, as long as it is used in moderation and diluted with water.


Tomatoes are prone to fungal diseases, especially during periods of wet spring weather. A combination of apple cider vinegar and water can prevent and treat leaf spots fungi, mildews and scab diseases. Combine 3 tbsp. of cider vinegar with 1 gallon of water. Put the solution into a spray bottle and spray your tomato plants every morning.


Fertilize your tomatoes with a mixture of water, ammonia and vinegar. Combine 1 cup ammonia with 2 cups of white distilled vinegar, then add it to 5 gallons of water. Use a watering can to sprinkle this mixture over your tomato plants and the surrounding soil. Do this about once every two weeks in the spring. This will encourage fruiting.


April Sanders

April Sanders is a writer, teacher and the mother of three boys. Raised on an organic farm, she is an avid gardener and believes that good growth starts with a rich, supportive foundation -- a philosophy that serves her well in both gardening and teaching. Sanders has written for Nickelodeon, Warner Brothers, Smarted Balanced, PARCC and others.