Lawnsmith Green-Up Ferrous Sulphate

Key Features
A soluble powder for liquid application
The best way to get rid of moss in lawns
Greens grass without causing growth

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For price comparison this is a 'Super Agro Pro' NOT a 'Super Green'!



Application rates:

To be mixed with water - 'no blockage' mixing instructions supplied with product

  • Green-up Rate: Year round; 0.5 - 1 gram m2 for a green-up anytime ground moisture is available
  • Hardening Rate: September to December; 1.5 - 2 grams m2 for cool weather disease resistance
  • Acidifying Rate: Spring & Autumn; 2+ grams m2 will temporarily lower pH/increase acidity
  • Worm Cast Reduction: Spring & Autumn; 2 grams m will temporarily reduce surface casting. May need up to 3 applications approximately 2-4 weeks apart
  • Moss Rate: September to May; 4-5 grams m2 in cool wet conditions
  • Maximum rate: 5g m2 in cool wet conditions normally from September to May

Do NOT use on grass less than 6 months old at rates higher than 2g/m2

Directions for Use

  • Supplied in re-sealable plastic tubs
  • A soluble iron sulphate powder for application as a liquid
  • Easily applied by sprayer or watering can with sprinkle bar
  • Use as standalone treatment or in conjunction with a lawn fertiliser
  • Do NOT mix with weed killer
  • Zero nitrogen gives green lawns without grass growth
  • Aids in disease resistance and worm cast control
  • Will keep indefinitely if kept sealed in the tub in a cool environment
  • Keep off hard surfaces as staining will occur
  • Lawn may be used once dry but staining can occur for up to 24 hours
  • Grazing pets may be allowed on after 3 cuts

Buying Guides


Season for Application
Early Spring, Late Spring, Summer, Early Autumn, Late Autumn, Winter,
Intended Use
Greening (minimal growth), Winterising,
Lawn Safety after Treatment
Pets that eat grass/weeds to be kept off for 3 cuts, Staining to feet may occur for 24hrs,
Soil Type
Clay, Loam, Sandy, Chalk,
Lasts for
Normal 4-6 weeks
Method of Application
By sprayer or watering can
Nutrient Content
NO Nitrogen, Iron, Sulphur,
Granule Size
Soluble Powder
Size and Coverage
2.5Kg Tub covers 500m2 @ 5grams or 2500m2 @ 1gram, 5Kg Tub covers 1000m2 @ 5grams or 5000m2 @ 1gram, 10Kg Tub covers 2000m2 @ 5grams or 10000m2 @ 1gram,
Product Type
Moss Control, Fertiliser, Pest & Disease,
Disease prevention, Lower pH - acidify, Reduce worm casting,
When to Use
Early Spring, Late Spring, Early Autumn, Late Autumn, Winter,

Customer reviews

4.8 / 5
608 reviews for Lawnsmith Green-Up Ferrous Sulphate
eKomi customer reviews
Michael Furnell
Very good product. No problems at all,would certainly recomend it.
Rated 5 out of 5
Richard Whitehill
Seems to have noticeable affect
Rated 4 out of 5
David Price
Mix 250 grams in a bucket of water and apply with a watering can
Rated 5 out of 5
Mike Feist
I followed the video which I don’t think emphasised the importance of making a pass without chemicals over the lawn to work out the amount of water you need, suggesting one could use the drive which proved an inadequate distance and method to be scaled up accurately. I assumed the video covered all of the necessary information, not realising that this was explained much better in the accompanying product leaflet until it was too late.
Rated 4 out of 5
Tony Kirk
I have used this a few times and it gives good control of moss and greens up the lawn. Easy to apply using knapsack sprayer and economical.
Rated 5 out of 5