Bought in different forms such as a soluble powder, granules mixed with sand, or granules mixed with fertiliser (more on this below)

This lawn treatment can be used in spring, summer or autumn. Be sure to keep children and pets away from the lawn at this time to prevent any harmful health effects. You can expect to see results in around seven days.

Too much iron sulphate can hurt your lawn. And if iron excess persists for too long, your lawn may also begin to die. So, watch out for these signs of too much iron sulphate on lawn: Lawn discolouration Compacted soil restricts the proper formation of deep roots. Grass with shallow roots has a lower chance of surviving and gives way to a wider moss infestation with its strong roots. Aerate your lawn at the proper times in the growing season. Safety How much do you need? When you mix iron sulphate you have some calculations to make. You can apply at a rate of between 1 gram per square metre to 5 grams per square metre. A tip here is that a typical slightly heaped teaspoon is 5 grams. It’s important to be aware that iron can stain concrete, and therefore you should be careful to avoid walkways, athletic courts, and concrete driveways when applying iron to your lawn.

The Maxicrop 2.5L Moss Killer + Lawn Tonic features a seaweed extract which is what makes it more unique, combined with the all-powerful ferrous sulphate for killing moss. This tonic is designed to be applied mixed into water, making it easy to apply and much less likely to burn the lawn. You can apply iron throughout the year (avoiding June, July, and August). Avoid walking on your lawn for seven days! Wet areas with poor drainage are likely to encourage the growth of moss. This is simply because moss needs a lot of water to be healthy and strong. If you need to, don’t hesitate to seek soil drainage options.

You can work on clayey and compacted soil for better drainage. Or create a berm to redirect the water flow. Doing so will also help improve the health of your lawn. The wrap-up To summarise, we recommend using no more than 1g per L water on very hot days. If you’re using 2-3g per L, you’ll want to wait until a mild morning with lots of ground moisture. If you use any higher concentrations than this, it’s best to wait until it’s cool and wet. How Often Should I Apply Iron Sulphate? Always read the instructions, but most iron-based garden products aren’t toxic or harmful to animals. Essentially, you’re applying natural minerals to your lawn, so it’s not like you’re adding harsh chemicals. Sold in durable plastic 12.6kg bags, the compost-sized bags contain iron sulphate that is known to have the desired effect on moss. It relies on Watersmart technology to ensure the soil entraps water and nutrients, which is an added feature not found in other products. Thanks to the way it breaks down in the soil, precise measurements aren’t as important with Grass Green as they are with iron sulphate. However, it is still possible to use too much - as with any NPK fertiliser, this can result in excessive thatch, causing the grass to smother itself.

When applying sand that contains Iron Sulphate, you need to apply 70g per m2. So, if you have an area of 50m2, that means you’ll need 3,500g (3.5 KG) to cover the whole area. How much iron sulphate to apply when it’s been mixed with fertiliser Next, follow these simple moss treatment methods in spring and autumn for optimal results: Spring moss treatment:Iron Plus 2-in-1 fertiliser improves the cell structure of the grass, making this product the perfect preparation for scarification. Ideally, use Iron Plus a week before dethatching.