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'!



Please note: Though this is classed as a fertiliser it is NOT lawn food but more like a vitamin. It is best used in conjunction with fertiliser for greening and grass health or by itself to build disease resistance, control moss and worm casting.

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

TOTAL maximum amount to use in any 12 months is 20 g/m2

Do NOT use on grass less than 2 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
  • Will not kill other plants though may temporarily blacken leaves if sprayed
  • 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
774 reviews for Lawnsmith Green-Up Ferrous Sulphate
eKomi customer reviews
vincent beacham
What amount is needed per gallon of water as I use a watering can
Rated 1 out of 5
Kelvin Lambert
Great product….
Rated 5 out of 5
Terry Reilly
Rated 5 out of 5
Great product, moss already turning black
Rated 5 out of 5
Keven Daly
Great product, dissolves quickly good results
Rated 5 out of 5