Lawn & garden
Evergreen Complete 4-in-1 Lawn Feed & Moss Killer dupe
Why pay around £24.00 for Evergreen? The bulk active is Agricultural soluble iron(II) sulphate heptahydrate — 91% less per working litre than a typical shelf pack.
From the retail pack to the active and the mix
1 · Retail
Evergreen Complete 4-in-1 Lawn Feed & Moss Killer
100 m² box · £24.00 typical snapshot
Granular filler and turf surfactant
2 · Active
Ferrous sulphate heptahydrate
100% on the label
7782-63-0FeSO4·7H2O
Bulk Agricultural soluble iron(II) sulphate heptahydrate
3 · Mix
10 g/m²
£0.45 per working litre · 91% less than the shelf pack
- Active
- Ferrous sulphate heptahydrate
- CAS
- 7782-63-0
- Dupe
- Agricultural soluble iron(II) sulphate heptahydrate
- Saving
- 91% / L
Saving is per litre of working-strength mix versus a typical pack price, not versus the DIY kit total. Shop prices move — always check the listing.
Label teardown
What the pack promises versus what the label chemistry actually is.
The marketing claim
“Feeds the lawn, kills moss, thickens turf and controls weeds”
The chemical reality
The moss-blackening punch is ferrous sulphate — the same agricultural iron used on bowling greens. The 4-in-1 box is mostly filler, NPK dust and a brand. Buy the salt.
Active vs filler
100% Ferrous sulphate heptahydrate · 0% carrier / filler — Granular filler and turf surfactant
- Typical retail
- £24.00
- 100 m² box
- Estimated active cost
- See bulk unit
- Scaled from bulk £18.50 / 25 kg
- Indicative markup
- 91%
- Snapshot maths, not a live shop price
The Marketing Claim & The Catch
A 100 m² box pack of Evergreen Complete 4-in-1 Lawn Feed & Moss Killer typically retails around £24.00 in lawn & garden. That is a UK shelf-price snapshot for the maths on this page — not a live shop quote or a manufacturer RRP. Listings, sizes and deals move. The marketing line is that you are buying a finished lifestyle product, not a weighed chemical.
On the pack: Feeds the lawn, kills moss, thickens turf and controls weeds; Greener grass in days; and One box treats 100 m².
The catch: The moss-blackening punch is ferrous sulphate — the same agricultural iron used on bowling greens. The 4-in-1 box is mostly filler, NPK dust and a brand. Buy the salt.
- “Feeds the lawn, kills moss, thickens turf and controls weeds”
- “Greener grass in days”
- “One box treats 100 m²”
Proprietary Blend & Dosage Breakdown
The labelled active is Ferrous sulphate heptahydrate at 100%. Everything else in the pack is granular filler and turf surfactant.
Even when the pack is sold as “pure” or ready-to-use, the dose that actually does the work is Ferrous sulphate heptahydrate. The rest is how they get it into a bottle you will pick up.
Branded working strength is whatever comes out of the bottle. The bulk alternative is 100% Agricultural soluble iron(II) sulphate heptahydrate, mixed to 10 g/m².
- Labelled active
- Ferrous sulphate heptahydrate
- 100%
- Carrier
- Granular filler and turf surfactant
- Retail pack
- 100 m² box · £24.00
The Active Chemical Alternative (Dupe Stack)
The dupe stack is Agricultural soluble iron(II) sulphate heptahydrate at 100% bulk. Indexed as CAS 7782-63-0, formula FeSO4·7H2O. Buy it as 25 kg for around £18.50 from Amazon UK.
Working strength: 10 g/m². Indicative cost £0.45 per diluted litre — 91% below a typical branded pack on a per-litre basis, before you reuse leftover bulk.
Follow the mixing method and the supplier SDS. Wear the listed PPE. Do not mix incompatible oxidisers, acids or ammonia.
- Ferrous sulphate stains stone, clothing and skin. Wear gloves and goggles; keep off patios.
- Apply 10 g per m² (1 kg per 100 m²). A 25 kg sack treats approximately 2,500 m².
- Dissolve in water at 10 L per 100 m² and apply with a watering can or boom, or spread dry and water in.
- Moss blackens within 48 hours. Rake out dead moss after 1–2 weeks and overseed bare patches.
- Do not apply to drought-stressed turf, and never mix with lime in the same tank.
Dilution recipe
10 L bucket
Working strength 10 g/m². Educational estimate from the listed ratio — check the SDS before you mix.
Chemical
1,000 grams
Agricultural soluble iron(II) sulphate heptahydrate
Water
10 litres
Carrier / diluent
0% concentrate · 100% water by working volume (solids are dissolved into the water share).
Required PPE
Loading calculator…
Side-by-Side Price & Potency Comparison
Head-to-head comparison
| Measure | Retail brandedEvergreen | Raw active dupeDupeStack |
|---|---|---|
| Product | Evergreen Complete 4-in-1 Lawn Feed & Moss KillerAmazon UK search — listing, not a confirmed seller | Agricultural soluble iron(II) sulphate heptahydrate |
| Pack / unit | 100 m² box · £24.00 | 25 kg · £18.50 |
| Active | Ferrous sulphate heptahydrate at 100%Carrier: Granular filler and turf surfactant | 100% bulkFeSO4·7H2O |
| CAS number | Not disclosed on pack | 7782-63-0 |
| Working strength | Ready-to-use pack | Dilute 10 g/m² |
| Cost per litre | £24.00 / pack | £0.45 / L mixed from bulk |
| Headline saving | Baseline | 91% cheaper |
| COSHH / PPE | Follow the branded SDS | Gloves. Chemical-resistant gloves (nitrile or neoprene)Eye protection. Indirect-vent splash goggles — not ordinary spectaclesVentilation. Use outdoors or with mechanical extraction |
Active ingredient and cheaper alternative — FAQ
Is Evergreen 4-in-1 the same as lawn sand?
Close cousins. The moss-killer in both is ferrous sulphate (CAS 7782-63-0). Lawn sand is often ferrous sulphate plus sand filler; Evergreen adds NPK and weed actives in a branded box. For moss blackening alone, buy the iron salt and skip the filler tax.
Will ferrous sulphate stain my patio?
Yes — it leaves orange-brown iron marks on pale stone, clothing and skin. Keep overspray off paving, or accept that you may need an oxalic wash afterwards (see HG Rust Stain Remover).
How do you mix the Evergreen Complete 4-in-1 Lawn Feed & Moss Killer dupe stack?
Ferrous sulphate stains stone, clothing and skin. Wear gloves and goggles; keep off patios. Apply 10 g per m² (1 kg per 100 m²). A 25 kg sack treats approximately 2,500 m². Dissolve in water at 10 L per 100 m² and apply with a watering can or boom, or spread dry and water in. Moss blackens within 48 hours. Rake out dead moss after 1–2 weeks and overseed bare patches. Do not apply to drought-stressed turf, and never mix with lime in the same tank.
DupeStack provides chemical concentration data and educational mixing guides only. Wellness pages compare food supplements, not medicines or prescribed treatments. Always review the supplier Safety Data Sheet (SDS) and comply with UK Health and Safety Executive (HSE) and COSHH regulations when handling concentrated substances. Mixing and storage are at your own risk. Some links are affiliate advertisements (Amazon Associates, eBay Partner Network, and Awin when those programmes are live). Commissions do not change listed concentrations or calculator output.
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More teardowns
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- Retail pack
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- Raw active
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- Retail pack
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- Retail pack
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- Raw active
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£41.48Save 91% / L
Indicative DIY stack