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The reason for Mowd's existence is our flagship DIY Lawn Care Subscriptions....
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Mowd | Helping the UK to create lush DIY Lawns
Lawn Area (m2):
"Great product with very good results first class advice and support would highly recommend"
Verified buyer on Trustpilot
Iron Sward is an Iron Sulphate lawn treatment which kills moss and rapidly greens up lawns.
Don't know your lawn size? Use our online measuring tool.
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Product Detail
This granular iron lawn treatment is specially formulated to effectively eliminate moss while quickly promoting the lush, green growth of grass. With its powerful moss-killing abilities and rapid green-up action, this product helps transform your lawn into a healthy and vibrant landscape.
Delivery & Returns
We have a number of delivery options available for your location, which are shown at the checkout.
Subscription Deliveries are sent out on a scheduled seasonal timetable.
For more information about delivery and returns see the delivery policy and refund policy
Safety Data Sheets
Iron Sward Iron Sulphate - Safety Data Sheet
Product Support
**WARNING** - Iron Sulphate can cause staining to hard surfaces (patios/decking/carpets etc). Apply carefully and remove any excess from non-lawn surfaces. Thoroughly clean footwear before wearing on hard surfaces or inside.
This is a granular product that can be cast using a bucket or hand fertiliser spreader.
Apply in dry conditions and sweep/blowing of excess of hard surfaces, such as patios to prevent staining!
Water in well after application (or apply before rain is forecast) and allow to dry before allowing children/pets on the area.
Please refer to the product Safety Data Sheet for full product information and always read the label before applying.
Nutrients / Ingredients
Iron (Fe) 12% + 5% Magnesium (MgO)
Application Rate / Coverage
35g/m2
~30m2 per KG
Frequently Asked Questions
A: Liquid Iron can green up the lawn as quickly as just a few hours but typically lasts only 1-2 weeks. Granular Iron Sulphate can take a few days to show its effects but lasts 4-6 weeks. The most interesting effect is with moss. Granular treatments penetrate moss much deeper and reduce the need for multiple applications. Iron Sward is a granular treatment lasting 4-6 weeks and is highly effective at sustaining grass green-up and moss destruction.
A: The addition of Magnesium enhances chlorophyll production to give your lawn a deep, vibrant green color. The homogeneous granules ensure an even color distribution on the lawn, even when applied at a lower rate.
A: Iron Sulphate can be applied at any time of the year, providing there is no risk of a frost. Water in well if no rain is expected.
A: Iron Sward iron sulphate lasts 4-6 weeks per application. Iron doesn't move freely in the grass plant, so regular applications are recommended.
A: Iron sulphate kills moss, turning it black and crispy. Once the moss is dead (after around 2 weeks), you can remove it with a rake or scarifier. It is worth considering seeding the areas from which you have removed moss to prevent the moss from returning. If the area is prone to moss returning, consider addressing the root cause. Improve drainage, improve sunlight access and use a lawn seed that is more resilient to shaded conditions.
Even at normal application rates, with 12% Iron, Iron Sward Iron Sulphate will blacken moss, allowing you to rake or scarify it up. It works quickly too, moss will start to turn black within 4 days and will be ready for scarifying within 2 weeks.
More than just Iron, the added Magnesium teams up with the Iron Sulphate to produce the most intense green lawn. You'll start to notice the difference in jus 4 days, and it will last for over 6 weeks!
Iron is essential for producing a hardy sward that is resilient to disease, stresses and heavy use. Want a lawn that is family-friendly and looks great? You need Iron Sward Iron Sulphate!
Iron is a nutrient that doesn't move around the grass plant very well, so regular applications are essential to prevent chlorosis (the yellowing of the grass leaf) and keep your lawn looking vibrant green.
