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Best moss killer UK

Updated: October 2026

Best moss killer UK is a job, not a bottle. A lawn that needs iron and a rake, a block-paved path, and a wide concrete patio are three purchases. This page names a top pick inside the twelve listings for a stated job, and who should skip it. The [moss killer comparison](/hub/weed-control/moss-killer) holds the table. Which? weights moss reduction, turf, raking and ease for lawn treatments, and the scores are paywalled, so none of those stars are used here. Prices are the shelf figures in the comparison. Price per square metre is listing coverage divided into that price. These picks are editorial choices from this set only. A qualifying purchase can earn a commission at no extra cost to you.

Best moss killer UK is a job, not a bottle. A lawn that needs iron and a rake, a block-paved path, and a wide concrete patio are three purchases.

Our top picks

Miracle-Gro Miracle-Gro Autumn 80 m²

Best overall

Miracle-Gro Miracle-Gro Autumn 80 m²
8.8/10about £12.48
View offer
GREENFORCE Greenforce 4-in-1 15 kg

Best value

GREENFORCE Greenforce 4-in-1 15 kg
7.8/10about £30.50
View offer
Resolva Resolva Moss Killer RTU 1 L

Alternative

Resolva Resolva Moss Killer RTU 1 L
6.8/10about £4.49
View offer
On this page
  1. 1.Best is a job, not a bottle
  2. 2.Lawn with a rake
  3. 3.Lawn without a rake
  4. 4.Permeable paving
  5. 5.Wide hard surfaces

Best is a job, not a bottle

If you are standing on grass, you want iron granules, a lawn concentrate, or the no-rake box. If you are on block paving, gravel or decking, you are in Resolva’s permeable group, and the maker bars lawns, concrete and tarmac. For a broad hard surface whose label allows it, Green Gone is the leave-on listing. Path and Drive claims moss as well as weeds and prints no square metres, so it is not crowned for coverage. Skip any “UK’s best” line that does not name the surface. Skip the generic 5 litre of 20% ferrous sulphate as a top pick: no MAPP, no reviews and no coverage in the raw file. RHS says fertiliser-grade iron should not be used to kill lawn moss unless it sits inside an approved proprietary product. A higher star line on a different job does not transfer. The buying guide explains the types.

Lawn with a rake

For an autumn lawn you will rake, the clearest listing is Miracle-Gro Autumn. It names iron sulphate and NPK 6-5-10. Skip it if you will not rake, if you need summer weeds controlled, or if granules might land on paving. The pack cell says 2.8 kg and the item weight says 3.1 kg, so check the box against the rate. For a large lawn, the Greenforce 15 kg bag is the lowest pence per listed square metre, and reviewers report scorch where a spreader dumps. The active and the pet line are not in the spec block. Skip it for a pocket lawn or a patio. The 3 kg Greenforce has the most reviews, but chunks block a spreader and no applicator is included. Miracle-Gro Complete is the pick when the weeds have names: dandelion, white clover and plantain, April to September. Mosskill is the watering-can concentrate, and it does not claim weeds.
Miracle-Gro Miracle-Gro Autumn 80 m²

Testsieger

Miracle-Gro Miracle-Gro Autumn 80 m²
8.8/10about £12.48
View offer

Lawn without a rake

The only listing that says you need not scarify is Westland Moss Master. The bullets say no raking, no black moss, and no staining of paths and patios. The maker describes bacteria, with dead moss showing over two to three weeks. That is different from sulphate of iron, which the RHS says you rake once it has blackened. Skip it if you need the reviews to agree. Several of 14 texts say people still raked, and scorch appears too. Season and method are missing. Westland also sells a similarly named product that does not kill moss. Do not merge the names. The raking page puts those reviews next to the Autumn date. Moss Master is a claim you can read, not a proven afternoon off.

Permeable paving

For block paving, gravel or decking, the low shelf price is the Resolva ready-to-use litre. Bullets name those surfaces, claim results in hours, rain-fast in one hour, and a non-staining formula. The maker is stricter: not lawns, not concrete or tarmac, and not from 18 September to 1 April. The maker also says rain within 12 hours may weaken the spray, next to the one-hour bullet. Follow the bottle. Several reviews say the nozzle failed. About 45p a square metre is a small-path price, not a drive price. Skip the 3 litre sold with Topline in the brand field if you came for a lawn or a roof. The title says lawns and roofs. The bullets say the formula removes grasses. The plain 1 litre at £8.99 states no surface, and reviews include leaks, so it is not the pick.

Wide hard surfaces

Green Gone prints a rate for a wider hard surface: 5 litres, up to 50 square metres, and you leave it on. Bullets claim algae, mould and moss, no acids or bleach, and up to nine months. Children and pets need not stay off once it is dry. Lichen is not named. One review said the watering can was missing. The active is not a chemical name, and the raw file shows no MAPP, so this page does not call it authorised. Skip it for a lawn. Path and Drive is the bottle when weeds and moss are both the job and pelargonic acid is named. It lists paths, drives, patios and gravel and says all year. There is no coverage figure. Do not expect a root kill the sources do not claim. Moss on the lawn edge and the slabs means two packs.

Common questions

What is the best lawn moss killer in this set?
For autumn, if you will rake, Miracle-Gro Autumn at £12.48 for 80 square metres. It names iron sulphate, blackening in seven days and a rake after two weeks, with 4.4 from 440 reviews. For named weeds from April to September, Miracle-Gro Complete is the closer match. Best without a month and a rake is not a pick you can use.
What is the best value per square metre?
On a lawn, the Greenforce 15 kg bag: £30.50 for 750 square metres, about 4p each, with 4.2 from 1,309 reviews. Skip it if you need a pet line the spec block does not print. Reviewers report scorch when a spreader dumps. The £4.49 Resolva is the low shelf price, at about 45p a square metre, not the low rate.
What should I buy for block paving?
The £4.49 Resolva, if the surface is permeable and you are outside 18 September to 1 April. It lists 10 square metres and has 4.2 from 423 reviews. Do not move it onto concrete or tarmac. The maker bars those surfaces.
What about concrete or tarmac?
Do not use Resolva. The maker excludes them because of runoff. Green Gone’s reviews mention concrete, and the raw file has no MAPP, so you still read the bottle. Lawn iron stains these surfaces. It does not clean them.
Is the £4.49 Resolva the bargain?
It is the lowest shelf price, with specific permeable-surface bullets. Per square metre it is about 45p, and reviewers report failed nozzles plus a winter ban the bullets omit. A bargain for a small path in season. A poor buy for a drive in January or for a lawn.
Should I buy the pro-grade jerrycan?
No, not as a moss killer from this set. The 5 litre 20% ferrous sulphate has no reviews, no MAPP and no rate. RHS says that grade of iron is not a freelance lawn moss killer. Use a pack with a label you can check.

Related pages

Moss killer for lawn or patio

Moss killer

How to choose a moss killer for a UK lawn or path

How to use moss killer on a lawn or a hard surface

Do you have to rake black moss after a moss killer

Sources

Public UK sources from the research digest. Shelf prices and star lines are the amazon.co.uk figures in the display file. Coverage rates are manufacturer claims, not a trial run for this page.

  1. RHS: moss in lawns (retrieved 16 October 2026)
  2. RHS: moss on hard surfaces (retrieved 16 October 2026)
  3. HSE: garden and home pesticides (retrieved 16 October 2026)
  4. HSE: COPR and moss claims (retrieved 16 October 2026)
  5. Westland: Resolva moss killer (retrieved 16 October 2026)
  6. Westland: Moss Master (retrieved 16 October 2026)
  7. Miracle-Gro Mosskill label (retrieved 16 October 2026)
  8. Marshalls: paving aftercare (retrieved 16 October 2026)