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Garden or food-grade Epsom salt

Updated: October 2026

You are comparing a garden carton around £7 to £9 with a Hexeal bucket that looks cheaper per kilogram and sits in Beauty. Garden or food-grade Epsom salt is a department choice: what the label allows, how the dose is written, whose reviews you are reading, and a price per kilogram only after the weight fields agree. The [Epsom salt fertiliser comparison](/hub/fertiliser-soil-and-bark-mulch/epsom-salt-fertiliser) is the full grid. Prices are the amazon.co.uk figures from the product data on 19 October 2026. Products Compared did not run a laboratory trial. A qualifying purchase can earn us a commission at no extra cost to you.

You are comparing a garden carton around £7 to £9 with a Hexeal bucket that looks cheaper per kilogram and sits in Beauty.

Our top picks

Westland Westland Epsom salts 1.5 kg

Best overall

Westland Westland Epsom salts 1.5 kg
8.2/10about £7.50
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Vitax Vitax Epsom salts 1.25 kg

Rank 2

Vitax Vitax Epsom salts 1.25 kg
8.9/10about £8.50
View offer
Hexeal Hexeal Epsom salt 5 kg

Alternative

Hexeal Hexeal Epsom salt 5 kg
7.7/10about £11.40
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On this page
  1. 1.What each label allows
  2. 2.Grams on a carton, spoons on a bucket
  3. 3.Whose reviews you are reading
  4. 4.Price per kilogram after the weight is clear

What each label allows

Westland’s brand page says the granules are not suitable for human consumption or for bathing. Those sentences are not in the amazon product data. The amazon row is still a Garden listing at £7.50, with 4.6 from 1,463 reviews about plants. You do not put that carton in the bath on the strength of the brand page. Hexeal’s listings lead with a bath: dissolve 250 g–1 kg, then a garden line, then FCC food-grade wording that tells you to check guidance before any food use. Rank is Beauty, Bath Salts. FCC food-grade is a purity phrase. It is not an MgO percentage and not a dose for eating. This page does not tell you to eat the salt.

Grams on a carton, spoons on a bucket

A garden brand page speaks in grams. According to the manufacturer, Westland’s site says 20 g per square metre. Vitax’s 90 g in 4.5 litres is the same strength as 20 g per litre. The amazon Westland row does not print those grams. Its mixing field is 1:0:0. The amazon Vitax carton prints 20g/l and does not print 16.6% MgO. Hexeal’s garden bullet is 1–2 tablespoons in around 4.5 litres. A tablespoon is not 20 g per litre unless you weigh that spoon. None of the amazon rows prints a magnesium oxide percentage.
Westland Westland Epsom salts 1.5 kg

Testsieger

Westland Westland Epsom salts 1.5 kg
8.2/10about £7.50
View offer

Whose reviews you are reading

Westland’s 1,463 UK texts, are garden themes: leaves, tomatoes and cardboard that leaked. Vitax B003MPGFIG’s 675 are the same kind of sample. Those are plant reviews. Hexeal’s 2.5 kg and 5 kg rows share one 4.5 from 547 line and the same 50 UK texts. Most describe baths. That is one file, not two fertiliser trials. The 1 kg bag is 5.0 from 2, and the saved text says food grade, not a tomato result.

Price per kilogram after the weight is clear

The 5 kg Hexeal title, unit count and item weight all say 5 kg at £11.40, about £2.28 per kilogram. Westland is £7.50 on a 1.5 kg title, but item weight is 1.44 kg. Vitax is £8.50 on a 1.25 kg title, but item weight is 500 g. Choose the 5 kg bucket when the three weight fields agree and you accept Beauty rank and bath texts. The match for each pack sits on best Epsom salt fertiliser.

Common questions

Is food-grade magnesium sulphate the same chemical as a garden carton?
Both are sold as magnesium sulphate, the salt called Epsom salt. The listing around it is not the same. A garden carton is ranked in Garden and reviewed for plants. A Hexeal bucket is ranked in Beauty, worded for baths, and marked FCC food grade. Food grade does not add NPK, and it does not print an MgO percentage on these amazon rows. The RHS still classes the salt as inorganic.
Can I put the Westland carton in the bath?
Westland’s brand page says the product is not for bathing and not for eating. That line is not in the amazon product-data bullets, so you will not see it as an Amazon feature in this file. Do not treat the absence as permission. The carton is the garden product. Bath doses in this set are on the Hexeal bullets, at 250 g–1 kg, and those listings are the bath products.
Can I put the Hexeal bucket on tomatoes?
The garden bullet names tomatoes and gives 1–2 tablespoons in around 4.5 litres. You can follow that bullet if you weigh the spoon and you accept that the 547 reviews are mostly baths and are shared between two ASINs. It is not a Garden-rank fertiliser trial. It is also not a slug treatment and not something this page tells you to swallow.
Why is the 5 kg bucket cheaper per kilogram?
Because £11.40 divided by 5 kg is about £2.28, and on that ASIN the title, unit count and item weight all say 5 kg. The 2.5 kg bucket is about £3.90 per kilogram on the same basis. Garden cartons cost more per titled kilogram and several of them have weight fields that disagree, so their price per kilogram is not a clean figure. The cheap kilogram does not buy a plant-review sample.
Do the 547 reviews judge it as a fertiliser?
Mostly no. The saved texts are baths, muscle soaks and feet, with a minority mentioning pots or gardening. The 2.5 kg and 5 kg pages use that same set of texts. Several still name the 5 kg bucket. Compare that with Westland’s 1,463 and Vitax’s 675, which are plant texts. A bath star line is not a fertiliser rating.
Does FCC mean I can eat it, or that it is organic?
Neither, on these sources. The Hexeal line says FCC food grade and tells you to check guidance before food or ingestion. No eating dose is printed, and this page does not supply one. FCC is not the Soil Association and not an organic fertiliser certification. Vegan on the 1 kg bag is a material feature, not a garden standard.
What dose is a tablespoon compared with 20 g per litre?
They are not the same until you weigh the spoon. Twenty grams per litre in 4.5 litres is 90 g. Hexeal prints 1–2 tablespoons in around 4.5 litres and does not print 90 g. Weigh one level tablespoon of the salt in your bucket and keep that number. The bath fill of 250 g–1 kg is a different job again. Gram rates for a carton you can read are on the how-to page.

Related pages

Epsom salt fertiliser buying guide

How to use Epsom salt fertiliser

Epsom salt fertiliser for tomatoes

Epsom salt fertiliser

Best Epsom salt fertiliser: which pack fits the job

Sources

Public UK sources from the research digest, used for this page in October 2026. Prices, stars and review counts are from the twelve amazon.co.uk listings captured on 19 October 2026. No listing here prints a magnesium oxide percentage. A shared review file is not two garden tests. This is not a laboratory test and not an RHS trial of these packs.

  1. RHS, Nutrient deficiencies (retrieved 19 October 2026)
  2. RHS, Fertilisers (retrieved 19 October 2026)
  3. RHS, Blossom end rot (retrieved 19 October 2026)
  4. GOV.UK, Manufacturing and marketing fertilisers (retrieved 19 October 2026)
  5. Regulation (EC) No 2003/2003 article 9 (retrieved 19 October 2026)
  6. Regulation (EC) No 889/2008 Annex I (retrieved 19 October 2026)
  7. Fertilisers Regulations 1991, Schedule 2 (retrieved 19 October 2026)
  8. Soil Association, organic salt clarification, 10 September 2024 (retrieved 19 October 2026)