Updated:31 October 2026
Rank 1-13 of the best Epsom Salt Fertilisers
Our recommendation Price Customer rating
1. Comparison winner
Hexeal Food Grade Epsom Salt 10kg
Hexeal Food Grade Epsom Salt 10kg
Available immediately
free shipping
  • increases magnesium uptake in soil to improve plant health
  • add 1-2 tablespoons per 4.5 litres of water for effective soil application
  • long-lasting impact on plant growth and soil quality
Our rating
9,8
very good
2. Bestseller
Epsom Salt for Plants, 5KG by Pure Source Nutrition
Epsom Salt for Plants, 5KG by Pure Source Nutrition
Available immediately
free shipping
  • enhances nutrient absorption with magnesium content for healthy plant growth
  • suitable for various plant, vegetable, and garden applications
  • provides a long-lasting effect, promoting overall plant vigour
Our rating
9,8
very good
Vitax Epsom Salts Fertiliser 1.25Kg
Vitax Epsom Salts Fertiliser 1.25Kg
Available immediately
free shipping
  • enables better uptake of magnesium by plants
  • application rate: apply 70 grams per square metre before sowing or planting as a base dressing, dissolve 20 grams per litre of water for liquid feed
  • long-lasting effect throughout the growing season
Our rating
9,6
very good
4. Best value
GroundMaster Epsom Salts Fertiliser 1L Tub
GroundMaster Epsom Salts Fertiliser 1L Tub
Available immediately
free shipping
  • nutrient absorption: the fertiliser promotes quick nutrient uptake and reduces soil acidity for healthier plant growth
  • application rate: use 5-10g per square metre before planting and 5g per square metre for top dressing, either by hand or with a spreader
  • long-lasting effect: a single application of the fertiliser lasts between 4-6 weeks
Our rating
9,6
very good
GroundMaster Epsom Salts Fertiliser 5kg
GroundMaster Epsom Salts Fertiliser 5kg
Available immediately
free shipping
  • promotes quick nutrient uptake for healthier plants
  • apply 5-10g per m² before planting, can be forked or raked into soil
  • single application lasts 4-6 weeks for long-term results
Our rating
9,5
very good
Elixir Gardens Magnesium Sulphate Epsom Salt 625g
Elixir Gardens Magnesium Sulphate Epsom Salt 625g
Available immediately
free shipping
  • magnesium enhances the absorption of nutrients like nitrogen and phosphorus, ensuring balanced plant nutrition
  • contains magnesium and sulphur for improved nutrient uptake and plant vitality
Our rating
9,5
very good
Gardenersdream Epsom Salts 1kg
Gardenersdream Epsom Salts 1kg
Available immediately
free shipping
  • enhances nutrient absorption for plants
  • suitable for use at 50 square metres per kilogram
  • provides long-lasting results for green foliage and blooming flowers
Our rating
9,5
very good
Vitax Epsom Salts Fertiliser
Vitax Epsom Salts Fertiliser
Available immediately
free shipping
  • provides rapid absorption of nutrients to treat magnesium deficiency
  • typical application rate is as directed on the package
  • offers long-lasting effects to support plant health
Our rating
9,5
very good
Grow Chem Epsom Salts 1 kg
Grow Chem Epsom Salts 1 kg
Available immediately
free shipping
  • provides essential nutrients like magnesium and sulphate
  • dissolves in water for ease of application
  • supports long-lasting plant vitality by promoting root development
Our rating
9,3
good
Westland Epsom Salts 1.5 kg Fertilizer
Westland Epsom Salts 1.5 kg Fertilizer
Available immediately
free shipping
  • promotes nutrient uptake to enhance plant health
  • application rate allows for use as a granular feed or dissolved in water
  • provides long-lasting effects for robust, green foliage
Our rating
9,1
good
Levington Epsom Salts 1.5KG
Levington Epsom Salts 1.5KG
Available immediately
free shipping
  • encourages optimal nutrient uptake in plants, enhancing overall growth
  • applies easily at a rate suitable for most garden sizes
  • provides long-lasting effects, ensuring sustained plant health
Our rating
9,1
good
Elixir 5kg Epsom Magnesium Sulphate Salt
Elixir 5kg Epsom Magnesium Sulphate Salt
Available immediately
free shipping
  • epsom salt enhances nutrient absorption through skin contact, helping relieve stress and promoting relaxation
  • recommended application rate: add two cups to warm water for a soothing bath or foot soak
  • magnesium ions provide long-lasting relief from muscle tension and pain
Our rating
9,0
good
Pure Source Nutrition Epsom Salt for Plants (500g)
Pure Source Nutrition Epsom Salt for Plants (500g)
Available immediately
free shipping
  • enhances nutrient absorption for healthier plant growth
  • suitable for various plants and garden applications
  • promotes long-lasting green colour in plants
Our rating
8,9
good

Similar Epsom Salt Fertiliser comparisons

Epsom Salt Fertilisers buying guide: How to choose the right product from the above Epsom Salt Fertilisers test or comparison

Introduction to Epsom Salt Fertiliser: What You Need to Know

Understanding Epsom Salt Fertiliser

Epsom salt, chemically known as magnesium sulphate, is a mineral compound that has been used for centuries in gardening. It is not actually a salt in the traditional sense, but rather a naturally occurring mineral that can enhance plant health. We can see it as a simple yet powerful addition to our gardening toolkit. It’s rich in magnesium and sulphur, two essential nutrients that help plants thrive. This makes it particularly useful for certain plants that show magnesium deficiency, often manifesting as yellowing leaves and poor growth.

The Role of Magnesium and Sulphur

Magnesium plays a crucial role in photosynthesis, the process by which plants convert sunlight into energy. Without enough magnesium, plants can struggle to maintain their health and produce fruit or flowers. Sulphur is equally important, aiding in the formation of proteins that are vital for plant development. By incorporating Epsom salt into our garden routine, we can effectively improve nutrient uptake, enhance seeding growth, and even increase crop yields.

How Epsom Salt Fertiliser Benefits Your Garden: Unlocking Plant Potential

Promoting Greener Growth

One of the most noted benefits of Epsom salt fertiliser is its ability to promote lush, green foliage. It’s particularly beneficial to leafy vegetables like spinach and lettuce. When we dissolve Epsom salt in water and apply it at the base of these plants, they absorb the magnesium, which helps in chlorophyll production. This results in healthier, more vibrant plants that are better equipped to grow and resist diseases.

Enhancing Flower and Fruit Production

If we’re looking to boost flowering and fruiting, Epsom salt is an excellent option. The magnesium in Epsom salt not only aids in the formation of flowers but also improves the quality of fruit, making them taste better and more nutritious. For example, tomatoes and peppers thrive with a little Epsom salt, resulting in fuller, juicier harvests.

Choosing the Right Epsom Salt Fertiliser: What to Look For

Identifying Quality Epsom Salt

When choosing an Epsom salt fertiliser, it’s important to look for pure magnesium sulphate with no added fragrances or chemicals. This ensures that we’re giving our plants the best possible chance to absorb the nutrients they need without any harmful additives. We can usually find this information on the packaging, so it’s wise to read the labels carefully.

Determining the Right Packaging Size

The size of the Epsom salt bag we choose can depend on the scale of our gardening. If we tend to work with smaller garden plots or potted plants, a 1 kg bag should suffice. However, for larger gardens or extensive landscaping projects, we might want to opt for a bulk purchase to ensure we have enough supply.

Easy Ways to Use Epsom Salt Fertiliser: Practical Tips and Techniques

Mixing and Diluting for Efficient Application

For effective application, we can mix Epsom salt with water to create a foliar spray or a soil drench. A common recommendation is to dissolve about 2 tablespoons of Epsom salt in a gallon of water. We can use this liquid to water our plants directly, allowing them to absorb the nutrients where they need them most.

Using Epsom Salt During Planting

Incorporating Epsom salt into the soil during planting is another easy technique. We can add a tablespoon of Epsom salt to the hole where we’re planting our seeds or seedlings. This ensures that they have immediate access to the magnesium and sulphur, giving them a strong start right from the beginning.

Frequently Asked Questions About Epsom Salt Fertiliser: Your Queries Answered

How often should I use Epsom salt fertiliser?

We can generally use Epsom salt every 4-6 weeks during the growing season, but it’s important to observe our plants. Signs of deficiency, such as yellowing leaves, can indicate that it’s time for another application.

Can all plants benefit from Epsom salt?

While many plants benefit from Epsom salt, not all plants require it. It’s particularly useful for flowering plants, vegetables, and some trees. If we’re unsure whether our plants need it, a little experimentation can help us see what works best.

Table of contents
  1. Introduction to Epsom Salt Fertiliser: What You Need to Know
  2. How Epsom Salt Fertiliser Benefits Your Garden: Unlocking Plant Potential
  3. Choosing the Right Epsom Salt Fertiliser: What to Look For
  4. Easy Ways to Use Epsom Salt Fertiliser: Practical Tips and Techniques
  5. Frequently Asked Questions About Epsom Salt Fertiliser: Your Queries Answered

Overview

1. Comparison winner
Hexeal Food Grade Epsom Salt 10kg
Our rating
9,8
very good
Hexeal Food Grade Epsom Salt 10kgAvailable immediately
2. Bestseller
Epsom Salt for Plants, 5KG by Pure Source Nutrition
Our rating
9,8
very good
Epsom Salt for Plants, 5KG by Pure Source NutritionAvailable immediately
Vitax Epsom Salts Fertiliser 1.25Kg
Our rating
9,6
very good
Vitax Epsom Salts Fertiliser 1.25KgAvailable immediately
4. Best value
GroundMaster Epsom Salts Fertiliser 1L Tub
Our rating
9,6
very good
GroundMaster Epsom Salts Fertiliser 1L TubAvailable immediately
GroundMaster Epsom Salts Fertiliser 5kg
Our rating
9,5
very good
GroundMaster Epsom Salts Fertiliser 5kgAvailable immediately
Elixir Gardens Magnesium Sulphate Epsom Salt 625g
Our rating
9,5
very good
Elixir Gardens Magnesium Sulphate Epsom Salt 625gAvailable immediately
Gardenersdream Epsom Salts 1kg
Our rating
9,5
very good
Gardenersdream Epsom Salts 1kgAvailable immediately
Vitax Epsom Salts Fertiliser
Our rating
9,5
very good
Vitax Epsom Salts FertiliserAvailable immediately
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