Epsom Salt for Your Plants - Inside and Out

Alicia W
by Alicia W
4 Materials
5 Minutes

Did you know you could use Epsom salt for your outdoor plants and your houseplants? It says so right on the label!!

Here are four different ways to use Epsom salt to give your plants a boost and one way to keep pests off of your hosta plants.

1: Tomato Plant Booster

Add two Tablespoons of Epsom salt to one gallon of water


Feed your plants every two weeks with this booster for bigger tomatoes.

2: Pepper Plant Booster

Add one Tablespoon of Epsom salt to one gallon of water.

Pour into a spray bottle.

Spray directly onto the plant every two weeks and you'll yield more peppers per plant.

3: Hosta Pest Remover

Combine one cup ammonia and one cup Listerine original mouthwash.

Add one cup Epsom salt and stir until salt is dissolved.

Add one cup lemon Ajax dish soap. DO NOT STIR IN.

Pour mixture into a spray bottle.

Spray hosta, wetting the leaves.

Repeat as often as necessary.

4: Indoor Plant Booster

Add two Tablesoons of Epsom salt to one gallon water

Water your houseplants once a month.

5: Give Transplanted Plants a Boost

Fill the planter pot with potting soil halfway to the rim.

Add a pinch or two of Epsom salt.

Combine salt into the soil. You don't want the plant to directly touch the salt.

Plant the new transplant as you normally would.

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  • Vicky Howell Vicky Howell on May 03, 2023

    How do I eliminate toilet bowl from hard water?

  • Gaylene Gaylene on Jun 22, 2023

    What is the recipe (epson salts) for boosting outdoor plants.

  • Julia Julia on Jul 25, 2023

    How do I rid of groundhogs? They are digging holes in my yard now are tearing my outdoor pillow on deck apart!! There are ALOT 25 at least living under my sheds and addition to my house.. please help!! Any advice I would appreciate!!!

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  • Krafty Kathy Krafty Kathy on Oct 10, 2023

    Great tip I use epsom salts on my tomatoes and roses outside. It is supposed to help with water retention and heat stress with peppers too.

    Just remember epsom salt is Magnesium Sulfate NOT TABLE SALT (Sodium Chloride) which kills plants.

  • Susan Grekso Susan Grekso on Oct 15, 2023