The Usage of Epsom Salt & Ammonia in Tomato Gardening


Tomatoes are among the most rewarding vegetables for a home gardener to grow. They taste infinitely better than their grocery store counterparts and require only a little help from you. To boost their growth, flowering and fruit production, try a couple of inexpensive home remedies--Epsom salt and ammonia. Epsom salt is magnesium sulfate. Magnesium is a nutrient needed for adequate plant growth. It is quickly depleted and often almost absent in Western United States gardens. Ammonia, according to the International Ag Labs, is a natural fertilizer that aids flowering and tomato setting.

Epsom Salt on Tomato Plants

Step 1

Apply 1/2 cup Epsom salt to the soil when the tomato plant begins to bloom. Hoe it in lightly and water for 10 minutes.

Step 2

Apply 1 tbsp. Epsom salt per foot of plant height to the soil, wet or dry. Repeat every two weeks during the growing season.

Step 3

Mix 1 tsp. Epsom salt in a spray bottle with clean water. Spray on leaves to discourage tomato-loving insects.

Ammonia on Tomato Plants

Step 1

Mix 2 cups vinegar, 1 cup ammonia and 5 gallons of water in a bucket.

Step 2

Sprinkle lightly over plants when they begin to flower and set fruit.

Step 3

Repeat the above process every two weeks for six weeks.

Things You'll Need

  • Epsom salt
  • Measuring spoon and measuring cup
  • Spray bottle
  • 2 cups vinegar
  • 1 cup BoPeep ammonia or similar brand
  • 5 gallon bucket


  • "The Orange County Register": Epsom Salts a Tonic for Plants and You
  • International Ag Labs: Tomatoes Farm and Garden

Who Can Help

  • North Carolina University Extension: Growing Tomatoes for Home Use
Keywords: ammonia tomato fertilizer, natural tomato fertilizer, Epsom salt fertilizer, inexpensive tomato fertilizers

About this Author

Julie Christensen has been writing professionally since 2001. She is a full-time freelance writer and former teacher with writing credits from several regional and national publications, such as Colorado Parent and LDS Living. She specializes in parenting, education and gardening topics. Christensen studied early childhood education at Ricks College, and spent 20 years as a teacher and director in university and public school settings.