March 25th, 2022 by Sarah Miles

Iron sulphate is used for grass greening but really it delivers so much more than that. Here are the most commonly asked questions about its benefits and the best times to apply it.

1. Does grass really need iron sulphate?
   Grass will, of course, grow on its own with just rain, sun, and some regular mowing but applying iron sulphate periodically will give it an extra boost of nutrients that allows it to grow stronger, be healthier, and look greener. If you want a vibrant, lush, green lawn, we really recommend using iron sulphate.
    
2. How does it make grass healthier?
   The greatest benefit that iron sulphate gives to grass is to enable it to retain more moisture in each blade. This makes it thicker, stronger, healthier, and also more resistant to the effects of conditions such as frost and drought.
    
3. Does it have any more benefits?
   As well as being better able to cope with frost and drought, healthier grass is more resistant to disease and pests. In fact, it will help prevent infestations of parasitic insects such as chafer grubs and leatherjackets as it makes the soil slightly more acidic, which they don’t like.
    
4. What time of year should you apply it?
   You can apply iron sulphate all year round but avoid very cold or very hot weather. Dry or frozen ground can make it very difficult for the treatment to penetrate and reach the roots. In fact, applying water to the frozen ground will just form ice and hamper efforts even further. Very hot temperatures can intensify the chemicals in the formula, and this could scorch and damage the grass. Cool conditions are the best ones for applying iron sulphate.
    
5. Can you apply after or before rainfall?
   Yes, you can and in fact, this is the best time to apply it. Because it benefits from as much moisture as possible to help it absorb, applying to ground that is already wet will really boost penetration down to the roots. An additional shower after application will help it further and actually save you the job of watering it in so if you see a window between two showers – take the opportunity and apply iron sulphate!
    
6. What should you use to apply it?
   Iron sulphate can be applied with a watering can or garden sprayer. If using in granule form, dilute to the right ratio (see instructions on the packaging) and make sure it’s thoroughly dissolved, then apply evenly across the lawn. If using liquid iron sulphate, you can pour this neat into the can or sprayer and apply as it is. If there is no rainfall imminent, water the application area thoroughly using a watering-can, sprayer, or a garden hose.