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Best sequestered iron in the UK for a named garden job

Updated: October 2026

The best sequestered iron UK question only makes sense once the job is named. This page picks one amazon.co.uk listing for acid-loving shrubs and one for a small lawn off the paving, then says what to leave. It does not teach chlorosis, and it does not walk through a dilution. Form is on the [iron fertiliser buying guide](/hub/fertiliser-soil-and-bark-mulch/iron-fertiliser/sub/iron-fertiliser-buying-guide). Prices are on the [iron fertiliser comparison](/hub/fertiliser-soil-and-bark-mulch/iron-fertiliser). Peter F., the DIY and tools editor, updated this on 21 October 2026 from those listings, not from a laboratory. A qualifying purchase can earn a commission at no extra cost to you.

The best sequestered iron UK question only makes sense once the job is named. This page picks one amazon.co.uk listing for acid-loving shrubs and one for a small lawn off the paving, then says what to leave.

Our top picks

Doff Doff Sequestered Iron Plant Tonic

Best overall

Doff Doff Sequestered Iron Plant Tonic
7.3/10about £5.99
View offer
Maxicrop Maxicrop Sequestered Iron 500 ml

Rank 2

Maxicrop Maxicrop Sequestered Iron 500 ml
8.9/10about £7.14
View offer
Pro-Kleen Pro-Kleen Iron Sulphate 2.5 kg

Alternative

Pro-Kleen Pro-Kleen Iron Sulphate 2.5 kg
6.6/10about £16.95
View offer
On this page
  1. 1.Best for which job
  2. 2.Shrubs and pots
  3. 3.A small lawn off the paving
  4. 4.Best value, with the gap on the label
  5. 5.What not to crown

Best for which job

A shrub on chalk, a small lawn, and a planted aquarium are three contests. Easy-Life Ferro, at 4.6 from 1,776, is an aquarium iron, so that count is the wrong scoreboard for a camellia. The powder under £10 is the best value when you already want sequestered iron and the mixing field is not a rate. If the green tub and the blue bottle still look the same, read iron sulphate or sequestered iron. The RHS timing for a camellia is mid-spring and early summer. That is not a brand rank.

Shrubs and pots

The top pick for shrubs and pots is Maxicrop Sequestered Iron, 500 ml, at about £7.14. It names acid-loving plants, adds seaweed, and states Soil Association approval for organic growing. The listing is 4.6 from 1,174 reviews. The mixing field says only 1. A named sheet is on the how-to page. Several reviewers say 500 ml is small. Two 1 litre bottles at about £17.00 are the same liquid, and the 1,174 reviews are the same line. A third 500 ml at about £12.41 shares the GTIN and is 4.2 from nine reviews.
Doff Doff Sequestered Iron Plant Tonic

Testsieger

Doff Doff Sequestered Iron Plant Tonic
7.3/10about £5.99
View offer

A small lawn off the paving

Pro-Kleen iron sulphate granules, 2.5 kg at about £16.95, are ready to use, with up to 83 m² on the listing. Use that coverage, not a gramme rate from another page. Bullets mention magnesium and seaweed, and up to three months if there is no frost. It may stain hard surfaces. Reviews disagree about moss, and there is no MAPP number. Blackening does not make this an authorised moss killer. A camellia is not this job.

Best value, with the gap on the label

Doff sequestered iron powder is about £5.99 for five 15 g packs, 4.7 from 22 reviews. The price is why it is the best value rather than the top pick. The mixing field is 1:0:0, the brand field says Plugplants.net, and only four UK texts sit against that count of 22. A Doff page that mentions lawns is not the amazon rate. Use the powder for a few shrubs when you will read the carton.

What not to crown

Easy-Life Ferro at about £10.39 stays in the tank: the bullet and the 1:20 field do not match. CANNA Mono FE at about £15.00 names no chelating agent and no garden dose, so stable at each pH is not an EDDHA claim. Substral at about £15.35 conflicts between 250 ml, 2,000 ml and 320 g, with German or Italian texts in the first 50 reviews. Sunshine at about £29.99 is 5 litres at 1:400, and the about £18.99 title disagrees with its own volume.

Common questions

What is the best sequestered iron here for a camellia?
For a camellia or rhododendron in this comparison, the top pick is Maxicrop sequestered iron, 500 ml, at about £7.14. It names acid-loving plants, includes seaweed, and carries the large UK review sample. It is a watering-can size, not a promise that every yellow camellia will turn green. If 500 ml is too little, the two 1 litre bottles are the same liquid.
Is the 500 ml Maxicrop a better shrub buy than the Doff powder?
It is the better-documented shrub buy: a 500 ml concentrate, a Soil Association line, and 4.6 from 1,174 reviews, against a powder at about £5.99 with 4.7 from 22 reviews and no usable amazon dilution. The powder is the best value when price is the constraint and the carton has a rate.
Which listing here is the one for a small lawn?
Pro-Kleen's 2.5 kg of iron sulphate granules, at about £16.95, with up to 83 m² on the amazon listing. It is ready to spread, and it warns about hard surfaces. Use it on a lawn you can keep off paving. Moss turning black, in some reviews, does not make it a licensed moss killer.
Should I buy two 1 litre bottles instead of 500 ml?
Buy the twin pack when one 500 ml bottle will not cover the shrubs you are already treating. At about £17.00 you get two litres, with the same organic-growing claim. Do not buy it to collect a second set of 1,174 reviews. Those texts are shared with the 500 ml listing. The mixing field is still 1:0:0.
Why is the other Maxicrop 500 ml not the same pick?
It costs about £12.41, shares the GTIN of the about £7.14 bottle, and shows 4.2 from nine reviews. Two UK texts are briefly positive, and neither describes a dose. There is no mixing field. If both are in stock, the about £7.14 listing is the one this page picks.
Does Easy-Life’s review count make it the best iron?
No. The 1,776 reviews sit on an aquarium supplement, and only 11 of the first 50 texts are from the United Kingdom. A weekly tank dose is not a shrub drench and not a lawn coverage. Match the job first, then the listing sold for that job.

Related pages

How to apply iron fertiliser

Iron fertiliser

Iron fertiliser buying guide: choose the right form

Iron sulphate or sequestered iron for a lawn or shrub

Yellow leaves and iron deficiency on youngest growth

Sources

Public UK and maker sources from the research digest, used for this page in October 2026. Prices, stars and review counts are from the ten amazon.co.uk listings. A Soil Association line is an organic-growing claim, not a pet study. The Maxicrop 2% and 45 ml figures are from the professional sheet, not from the amazon mixing field. Chelate pH bands from a US extension summary are not UK law.

  1. RHS, nutrient deficiencies (retrieved October 2026)
  2. RHS, chalky soils (retrieved October 2026)
  3. RHS, moss in lawns (retrieved October 2026)
  4. GOV.UK, manufacturing and marketing fertilisers (retrieved October 2026)
  5. legislation.gov.uk, Regulation (EC) No 2003/2003, Article 9 (retrieved October 2026)
  6. HSE, garden and home pesticides (retrieved October 2026)
  7. Maxicrop professional iron sheet (retrieved October 2026)
  8. Easy-Life Ferro (retrieved October 2026)