Call us now on 0800 091 3171

0800 091 3171
based on 1651 reviews Trustpilot
number of days guarantee image
30-day money back guarantee 100% customer satisfaction guaranteed
truck and clock image
Next day delivery available on most products
Product image

2.5kg of Pro-Kleen Iron Sulphate | Grass Greening, Moss Killing & Turf Hardening

£9.99 exc VAT
£11.99 inc VAT

2.5kg of Pro-Kleen Iron Sulphate | Grass Greening, Moss Killing & Turf Hardening

Quick code: 232861

2 reviews
£9.99 exc VAT
£11.99 inc VAT

Free delivery on this product*

Order now for delivery 27 March

  • Make your neighbours envious with a healthy, lush green lawn all year round
  • Removes moss, hardens turf, prevents lawn disease for healthy, green grass
  • Easy to use and apply with clear usage instructions on the back of the tub
  • Extremely powerful formula used by greenkeepers, lawnkeepers and more
  • Encourages growth of healthy, dark green grass whilst suppressing worm casts
See more product details
  • In stock
  • Warranty: Not applicable
  • 30 day money-back guarantee
  • Have a question? Call 0800 091 3171

Product information

Brand - Pro-Kleen

2.5kg of Pro-Kleen Iron Sulphate

Available in 1kg, 2.5kg, 5kg, 7.5kg and 10kg!

Pro-Kleen Iron Sulphate is a long-lasting fertiliser, rich in iron, that kills moss on lawns, helps prevent lawn disease, encourages growth of healthy dark green grass whilst suppressing worm casts. Iron sulphate is also known as ferrous sulphate and sulphate of iron. Benefits of using iron sulphate are: grass greening, turf hardening and moss killing. Did you know that it also helps to keep your grass healthy throughout the winter months?

Why choose Pro-Kleen Iron Sulphate?


Our iron rich and long lasting formula encourages strong, healthy green grass to improve the appearance and quality of lawns. It's highly effective in grass greening, moss killing and turf hardening!


Pro-Kleen Iron Sulphate is used and trusted by greenkeepers, lawn keepers, park keepers and sports groundsmen for perfect pitches, green lawns and superior golfing greens all across the UK.


Our thoroughly revised, tried and tested formula even helps to prevent lawn disease with its turf hardening qualities.


Pro-Kleen's easy to use, resealable tub makes it easy to close after use and conveniently reseals for optimum freshness.


Simply refer to the suggested usage on the reverse of the tub, dissolve your chosen amount of solution into water and apply via watering can or sprayer onto your grass.

Grass Greening

For greener, healthier looking grass, mix with water at the rate of 10g-20g per 10 litres of water for 10 square metres of lawn. You can use iron sulphate at this concentration at any time of year as long as good soil moisture is available and there is no strong sun or heat!

2.5kg will cover over up to 2500 square metres 

1-2g per 1 litre of water per 1 square metre 

10-20g per 10L of water per 10 square metres.

Turf Hardening

Increase the concentration and not only will it have an amazing effect on the greenness of your grass but it will also start to ‘harden’ the turf making it more resistant to disease and fungal attack. This makes it a very common practice on sports turf in autumn and winter. Blackening of moss will also start to occur. For hardening, we recommend applying between September and April when plenty of moisture is available and when sunshine is unlikely.

2.5kg will cover over 1000 square metres

2-3g per 1 litre of water covers 1 square metre.

20-30g per litres of water covers 10 square metres

Removing Moss

As a guide, use 5g to 1 litre of water when removing moss.

40-50g per 10L of water per 10 square metres. 

2.5KG Covers 500 square metres.

Mosses are plants, comparatively simple in structure and function and, with the Liverworts, comprise the Bryophyta family – one of the least complicated groups of the plant kingdom. Moss is unsightly and often hard to manage. Simply increase the concentration to get rid of it. Moss grows where there is nutrient poor soil, high acidity soil, compacted soil, or soil that drains poorly or where there is excessive shade basically where grass cannot survive. Sulphate of iron, commonly applied in winter or early spring kills the moss. After the moss turns brown, you can rake it loose with a garden to remove it from the lawn.


If you have a problem with moss on patios, pavements, driveways or other hard surfaces, then click here.

Causes of moss invasion:

  • A moist turf – poor drainage encourages the fern-like and tufted mosses
  • A very dry soil, e.g. over drains, on mounds and ridges
  • Cutting grass too low 
  • Diseased turf
  • Dry acid soil
  • Low fertility / deficiencies of plant nutrients
  • Low nutrient status
  • Over-consolidation of the soil
  • Shade from hedges, trees, buildings and topography – north facing lawn
  • Prolonged periods of wet weather
  • Time of year – autumn, winter and spring


Rating 5 out of 5 based on 2 reviews.
Powered by Trustpilot
Showing 1 to 2 of 2 Reviews
Bill behan
Killed all moss in the lawn and left the grass nice and green highly recommend
24 May 2017
Jennifer Tucker
Lawn was pretty bad and still looks awful but at least the moss is dying.
5 Apr 2017

Frequently asked questions

Yes, it is safe to use near pets. However, we would advise you to keep them away from the grass for 12 - 24 hours after application. 
How often should I feed my lawn of 40 sq metres?
We would advise to treat in Autumn, Winter and Spring with two applications, one to two weeks apart.
Can I apply in. November / December to kill moss and fungus growth? Please give concentration required. Many thanks Roger
Yes, this can be used in Autumn, Winter and Spring. The concentration would depend on what you are using the Iron Sulphate for. Please see product details for application on grass greening, turf hardening or removing moss.
Does it get rid of wormcast
As this product encourages healthy grass growth, it will help to surpress worm casts.
Will treatment with iron sulphate deter moles, ie by cutting out the number of worms in your lawn
We are not aware of this product detering moles, but it will surpress worm casts.
Can this product be used on artificial grass to kill the weeds at the edges?
This product will not kill weeds, and we would not advise you to use on artificial grass.
Ask a question?

Ask one of our experts!

We aim to answer all questions as soon as possible - often within a few hours! Although please bear in mind that during busier periods it may take up to 48 hours to receive a response. We look forward to hearing from you.


Secure Shopping

Enjoy the latest news, offers and ideas

item(s) added to basket

Checkout Continue shopping