Epsom salt in the garden: application, effects and benefits for plants

Lush green, strong needles, and vital plants – who wouldn't want that for their garden? Yet plants often lack one crucial building block: magnesium. That's where Epsom salt (magnesium sulfate heptahydrate) comes into play. Learn all about the effects and proper application of this proven garden helper.

What exactly is Epsom salt?

Epsom salt, chemically known as magnesium sulfate heptahydrate ( $MgSO_4 \cdot 7H_2O$ ), is a natural mineral. It is highly water-soluble and, due to its purity (Grades: Clean/Pharmaceutical), is valued not only in industry but especially as an efficient magnesium fertilizer. Magnesium is the heart of chlorophyll – without this substance, plants cannot perform photosynthesis and lose their color.

The benefits for your garden at a glance

Immediate relief for magnesium deficiency: Prevents yellowing of leaves (chlorosis) and browning of conifers.
Promotes growth: Supports the uptake of nitrogen and phosphorus.
Versatile use: Ideal for conifers, lawns, roses, and vegetable plants like tomatoes.
High purity: Thanks to the quality from BioLaboratorium, you receive a pure product without harmful additives.

Typical areas of application

1. Rescue for conifers and hedges

Firs, spruces, and arborvitaes (Thuja) are sensitive to magnesium deficiency, often indicated by browning from the inside out. Regular application of Epsom salt strengthens their resilience and ensures deep green needles.

2. A must for tomatoes and peppers

These heavy feeders require plenty of magnesium for fruit development. Epsom salt helps strengthen cell structure and prevents deficiency symptoms that are often mistaken for diseases.

3. Vital lawn

A pale, weak lawn benefits enormously from a magnesium spray. The result is a dense, emerald green turf.

Application and dosage

Epsom salt can be applied either dry scattered or as a liquid fertilizer via the leaves (foliar feeding). The latter works particularly quickly, as the plant absorbs the nutrients directly through the foliage.

Plant	Recommended application
Conifers / Needle trees	Scatter approx. 50–100g per $m^2$ under the tree canopy and water well.
Foliar feeding (Acute)	Dissolve 10–20g of Epsom salt in 1 liter of water and spray the leaves.
Lawn	Distribute approx. 30g per $m^2$ evenly (preferably before rain).

Pro tip: Conduct a soil analysis before large-scale fertilization. Epsom salt only helps with magnesium deficiency, not with general over-fertilization or acidic soils without a nutrient deficit.

Storage and safety

Since this is a chemical compound, proper storage is essential:

Store the Epsom salt in a dry, cool, and well-ventilated place.
Protect it from direct sunlight and moisture to prevent clumping.
Keep the product sealed in its original packaging and away from strong-smelling substances.

Conclusion:

Epsom salt from BioLaboratorium is a true all-rounder. Whether for agriculture, the cosmetics industry, or your home garden – the high purity of magnesium sulfate heptahydrate guarantees optimal results in plant care.