Lawn & garden
Doff Concentrated Lawn Weedkiller dupe
Why pay around £8.49 for Doff? The bulk active is Mecoprop-P 37.5 g/L + dicamba 4.675 g/L lawn concentrate — 50% less per working litre than a typical shelf pack.
From the retail pack to the active and the mix
1 · Retail
Doff Concentrated Lawn Weedkiller
200 millilitres · £8.49 typical snapshot
Water (potassium salts as a soluble concentrate)
2 · Active
Mecoprop-P and dicamba
4.2% on the label
16484-77-8 / 1918-00-9C10H11ClO3 + C8H6Cl2O3
Bulk Mecoprop-P 37.5 g/L + dicamba 4.675 g/L lawn concentrate
3 · Mix
50 ml in 5 L water (25 m² — Doff label band)
£0.20 per working litre · 50% less than the shelf pack
- Active
- Mecoprop-P and dicamba
- CAS
- 16484-77-8 / 1918-00-9
- Dupe
- Mecoprop-P 37.5 g/L + dicamba 4.675 g/L lawn concentrate
- Saving
- 50% / 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
“Kills weeds, not lawns”
The chemical reality
Doff’s 200 ml lawn bottle is mecoprop-P at 37.5 g/L plus dicamba at 4.675 g/L — a selective auxin herbicide for turf, not glyphosate. Weedol LN Conc is the same pair. Current Weedol Lawn (MAPP 17599) is a different three-way — MCPA, fluroxypyr and clopyralid — see that teardown. A 1 L bottle of the mecoprop-P/dicamba formulation is the same working spray without the 200 ml garden-centre tax.
Active vs filler
4.2% Mecoprop-P and dicamba · 96% carrier / filler — Water (potassium salts as a soluble concentrate)
- Typical retail
- £8.49
- 200 millilitres
- Estimated active cost
- £4.00
- Scaled from bulk £19.99 / 1 litre
- Indicative markup
- 2.1×
- Snapshot maths, not a live shop price
The Marketing Claim & The Catch
A 200 millilitres pack of Doff Concentrated Lawn Weedkiller typically retails around £8.49 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: Kills weeds, not lawns; Targets daisies, dandelions, clover and docks; and Systemic — works down to the roots.
The catch: Doff’s 200 ml lawn bottle is mecoprop-P at 37.5 g/L plus dicamba at 4.675 g/L — a selective auxin herbicide for turf, not glyphosate. Weedol LN Conc is the same pair. Current Weedol Lawn (MAPP 17599) is a different three-way — MCPA, fluroxypyr and clopyralid — see that teardown. A 1 L bottle of the mecoprop-P/dicamba formulation is the same working spray without the 200 ml garden-centre tax.
- “Kills weeds, not lawns”
- “Targets daisies, dandelions, clover and docks”
- “Systemic — works down to the roots”
Proprietary Blend & Dosage Breakdown
The labelled active is Mecoprop-P and dicamba at 4.2%. Everything else in the pack is water (potassium salts as a soluble concentrate).
At 4.2% active, most of what you pay for is carrier and packaging. The brand is selling convenience, fragrance and a label — not a uniquely potent molecule.
Branded working strength is whatever comes out of the bottle. The bulk alternative is 4.2% Mecoprop-P 37.5 g/L + dicamba 4.675 g/L lawn concentrate, mixed to 50 ml in 5 L water (25 m² — Doff label band).
- Labelled active
- Mecoprop-P and dicamba
- 4.2%
- Carrier
- Water (potassium salts as a soluble concentrate)
- Retail pack
- 200 millilitres · £8.49
The Active Chemical Alternative (Dupe Stack)
The dupe stack is Mecoprop-P 37.5 g/L + dicamba 4.675 g/L lawn concentrate at 4.2% bulk. Indexed as CAS 16484-77-8 / 1918-00-9, formula C10H11ClO3 + C8H6Cl2O3. Buy it as 1 litre for around £19.99 from Amazon UK.
Working strength: 50 ml in 5 L water (25 m² — Doff label band). Indicative cost £0.20 per diluted litre — 50% 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.
- Pesticide: read the HSE/MAPP label on the bottle you buy. Gloves, long sleeves, no spray drift onto flowers or ponds.
- Mix 50 ml of 37.5 g/L mecoprop-P + 4.675 g/L dicamba concentrate into 5 L of water — 25 m² of established lawn, maximum two applications a season on the Doff band.
- Apply on a still, dry day above about 15 °C when weeds are growing. Keep pets off until dry. Do not mow for 24 hours. Do not treat lawns under six months old.
- 1 litre of concentrate at 50 ml per 5 L batch makes 20 batches (100 L of working spray) — five 200 ml Doff bottles.
- Compost the first four mowings for six months before using as mulch. Triple-rinse the can; never put glyphosate in the same sprayer afterwards without a thorough wash.
Dilution recipe
5 L sprayer
Working strength 50 ml in 5 L water (25 m² — Doff label band). Educational estimate from the listed ratio — check the SDS before you mix.
Chemical
50 millilitres
Mecoprop-P 37.5 g/L + dicamba 4.675 g/L lawn concentrate
Water
4.95 litres
Carrier / diluent
1% concentrate · 99% 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 brandedDoff | Raw active dupeDupeStack |
|---|---|---|
| Product | Concentrated Lawn WeedkillerAmazon UK search — listing, not a confirmed seller | Mecoprop-P 37.5 g/L + dicamba 4.675 g/L lawn concentrate |
| Pack / unit | 200 millilitres · £8.49 | 1 litre · £19.99 |
| Active | Mecoprop-P and dicamba at 4.2%Carrier: Water (potassium salts as a soluble concentrate) | 4.2% bulkC10H11ClO3 + C8H6Cl2O3 |
| CAS number | Not disclosed on pack | 16484-77-8 / 1918-00-9 |
| Working strength | Ready-to-use pack | Dilute 50 ml in 5 L water (25 m² — Doff label band) |
| Cost per litre | £42.45 / L typical pack | £0.20 / L mixed from bulk |
| Headline saving | Baseline | 50% 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 this the same as Weedol Pathclear?
No. Pathclear is glyphosate for paths and bare ground — it will kill grass. This bottle is mecoprop-P (CAS 16484-77-8) plus dicamba (CAS 1918-00-9) for broad-leaved weeds in established lawns. Weedol LN Conc is the same pair; current Weedol Lawn is MCPA/fluroxypyr/clopyralid — different SDS, different teardown.
Can I use SBK triclopyr on the lawn instead?
Wrong tool. SBK is triclopyr for woody weeds and brambles; it can scorch turf at brushwood rates. Daisies and dandelions in grass are this teardown, not SBK and not glyphosate.
How do you mix the Concentrated Lawn Weedkiller dupe stack?
Pesticide: read the HSE/MAPP label on the bottle you buy. Gloves, long sleeves, no spray drift onto flowers or ponds. Mix 50 ml of 37.5 g/L mecoprop-P + 4.675 g/L dicamba concentrate into 5 L of water — 25 m² of established lawn, maximum two applications a season on the Doff band. Apply on a still, dry day above about 15 °C when weeds are growing. Keep pets off until dry. Do not mow for 24 hours. Do not treat lawns under six months old. 1 litre of concentrate at 50 ml per 5 L batch makes 20 batches (100 L of working spray) — five 200 ml Doff bottles. Compost the first four mowings for six months before using as mulch. Triple-rinse the can; never put glyphosate in the same sprayer afterwards without a thorough wash.
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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- Retail pack
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£28.00Save 50% / L
Indicative DIY stack