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

From £12.98 inc VAT
From £10.82 exc VAT

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

474 reviews
From £12.98 inc VAT
From £10.82 exc VAT

Usually delivered the next working day

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  • Make your neighbours envious with a healthy, lush green lawn all year round
  • 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
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  • In stock
  • 30 day money-back guarantee
  • Product Code: 232861
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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 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 and turf hardening. 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 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. 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

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

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

1kg Covers 100 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 removes the moss. After the moss turns brown, you can rake it loose with a garden to remove it from the lawn.


Rating 4.7 out of 5 based on 474 reviews.
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Christine Spencer
Great service highly recomend.
18 Sep 2018
Lorraine wall
Very good product kills moss straight away only problem is scrapping it up
22 Jun 2018
Kevin of Bath
Very effective for moss killing. Recommend you use a weaker solution than stated on pack first to test on your lawn
13 Jun 2018
G Millward
Did what it said on the tin!!
12 Jun 2018
Did the job efficiently. A small measuring scoop would have been useful.
1 May 2018
Andrew near York
came in damaged package and leaking. Phoned company and sent photo of damaged container. Immediately sent me a replacement free of charge. Excellent customer service . I know product good having used before.
16 Apr 2018
Customer Terence Cox
Delivery and product perfect
16 Apr 2018
Chris H
Well it certainly killed the moss almost immediately. Now I've got 2.49kg left......... a smaller size might be useful for some of us town dwellers! But it did the job, just fine.
16 Apr 2018
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
Amazon Customers
464 Amazon customers reviewed this product

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.
How long after applying Iron Sulphate before reseeding bare patches?
Once the moss has blackened and been raked away from the lawn, we would advise you to leave one to two weeks before reseeding.
Will this harm fish if used near ponds when mixed to the moss killing dilution
Although the product is not classified as environmentally hazardous, this does not exclude the possibility that large or frequent spills can have a harmful or damaging effect, so we would advise to avoid contact with the pond.

Please advise on usage of Iron Sulphate with regard to dog and cat welfare - thanks
After application to your grass do not allow your pets or children onto the treated area for 12-24 hours.
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