Verdict: Unless you have a magnesium deficiency in your garden, there is no need to add Epsom salts. Doing so could even be harmful to soil, plants and water.
It's also said to help seeds germinate and repel slugs and other garden pests. But unless your soil has a magnesium deficiency, the University of Minnesota Extension Service recommends against adding Epsom salt. Too much can harm your plants and soil.
Carnivorous plants — Pitcher plants, venus flytraps, and sundews are some insect-eating plants that should not be applied with Epsom salts. Because they are adapted to grow in mineral-poor and depleted soil, supplementing fertilizers with even a tiny dosage could mean death to the bug-trapping ornamentals.
Lightly sprinkle directly atop the grass
You can dilute Epsom salt with water and use it as a soil drench.
Using Epsom salts to fertilize your soil directly
If you're applying the salt directly, then you should aim for one teaspoon of salt per foot of size approximately once every month. And while this tip is useful for gardens, it's also suitable for your best indoor plants too.
Adding Epsom salts to soil that already has sufficient magnesium can actually harm your soil and plants, such as by inhibiting calcium uptake. Spraying Epsom salt solutions on plant leaves can cause leaf scorch. Excess magnesium can increase mineral contamination in water that percolates through soil.
For general garden start-up, mix one cup of Epsom salts per 100 square feet into soil before planting. To boost germination, mix one tablespoon of Epsom salts in a gallon of water and add to soil after seeding.
Epsom salt spray can be used late in the growing season to increase tomato and pepper yield and keep plants green and bushy. Early in the season, you can add Epsom salt to the soil to aid germination, early root and cell development, photosynthesis, and plant growth, and prevent blossom-end rot.
Magnesium deficiency
Symptoms: Yellowing between the leaf veins, sometimes with reddish brown tints and early leaf fall. Magnesium deficiency is common in tomatoes, apples, grape vines, raspberries, roses and rhododendrons.
If your plant's leaves are turning yellow, it might have a sulfate deficiency. If your plant's leaves are turning yellow but the veins remain green, it might have a magnesium deficiency. Epsom salts are a great solution for both of these problems.
Mix one tablespoon of Epsom Salts per quart of warm water.
What happens if I overdose on Magnesium Sulfate (Epsom Salt)? Overdose symptoms may include nausea, vomiting, flushing (warmth, redness, or tingly feeling), feeling very hot, slow heart rate, extreme drowsiness, or fainting.
Epsom salt contains relatively high levels of magnesium and sulfur. Although these are essential elements plants need, they are among many that contribute to growth and flowering or fruiting. Both elements aid in photosynthesis and help plants absorb the three macronutrients (nitrogen, phosphorus, and potassium).
For a standard-sized tub, use the amount suggested on the package, usually 1 to 2 cups, or the amount recommended by your doctor. Don't use Epsom salts in a hot tub, whirlpool, or other tub with jets unless the manufacturer says it's OK. Keep the part of your body that hurts in the water for at least 12 minutes.
Prevent Fungal Disease
MAKE IT: Mix 1 teaspoon of baking soda and 2-3 drops of liquid soap in 1 liter of water. Spray the solution on the infected plants. Baking soda helps the plants become less acidic and prevents fungal growth.
Epsom salt is a fantastic way to fight soil deficiencies in your house plants by providing magnesium and sulfur micronutrients. Adding 25 grams per liter of water and watering with this mix once a month will ensure growth and greener foliage.
How does Epsom and healing salt work? Epsom Salts were first named for a saline spring in Surrey, England and have the chemical composition of Magnesium Sulphate which is an Alkaline chemical compound.
2. Fertilize your Succulents. Epsom salt works wonders as a fertilizer during the growing season and can help keep your succulents looking lush and beautiful for a long while. In addition, using an Epsom salt fertilizer is a great way to help encourage blooming in many succulents.
If you decide not to rinse off afterwards, your body may benefit for longer from the purported healing properties of the salt. However, Epsom salts can sometimes have a drying effect, so you may want to have a quick rinse off afterwards, especially if you have dry skin anyway.