'Magic' item that removes lawn moss 'overnight' and costs less than £10

Moss can swiftly invade your lawn through airborne spores, quickly spreading from one spot to another once it finds a suitable dark and damp environment to flourish in, including on patios and fences. A gardening expert, facing a mossy predicament, sought advice on Facebook's Gardening Hints and Tips page.

Alberta Bee posted: "My grass has a lot of moss coming through." She asked: "Anything I can use without damaging lawn. Also, any recommended fertilisers to boost its health?" Fellow green-fingered enthusiasts suggested that Alberta should first rake out the moss, but not before using a particular substance - iron sulphate.

Lasma Styles advised: "Iron sulphate is used to green and toughen up grass as well as to kill off moss."

"No need to bother with fancy moss killers, this works like magic. In two to three days the moss has died.

"Then you can scrape the blackened moss out and enjoy your green green grass. You just need to dilute the iron sulphate correctly and not overdo it - too much is no good."

Stewart Clarke said: "Sulphate of iron will kill it off overnight. Use a watering can to put it on the lawn.

"It will go brown but the moss can then be raked off the lawn. Sulphate of iron will also make the grass greener and thicker."

Chris Ivey offered a specific recipe: "Use two and a half tablespoons of sulphate of iron, dissolve in one litre of hot water then makeup to two gallons with cold water.

"Using a watering can sprinkle over the mossy area. In two days the moss will die and turn black so you can rake it out.

"The sulphate of iron will actually feed the grass left leaving it greener for you."

Gardening enthusiasts can find iron sulphate at a number of gardening retailers or online. At the moment, you can get a 1KG tub of iron sulphate on Amazon, which according to the listing will cover 1000sqm of grass.

Buyers report that this product effectively eliminates moss within minutes whilst leaving grass and plants unaffected. They also praise its straightforward application and easy instructions.

Reviews also highlight the product's excellent value for money and note that it blackens moss within 12 hours.