Using Iron Sulphate for Moss Control
How Iron Sulphate Works as a Moss Control
Iron sulphate, also known as ferrous sulphate (FeSO₄), is a popular and effective solution for controlling moss in lawns and gardens. This compound not only helps suppress moss growth but also provides additional benefits to the soil and grass, making it a dual-purpose treatment. Here’s how it works:
1. Impact on Moss
Iron sulphate is toxic to moss when applied correctly. The iron in the compound directly affects the moss by causing it to dehydrate and die. This happens because moss lacks the ability to efficiently regulate water uptake and mineral absorption, unlike grass. When exposed to iron sulphate, the moss blackens and withers within days, making it easier to rake out.
2. Improvement of Soil Acidity
Iron sulphate slightly acidifies the soil, creating an environment that is less favourable for moss. Moss tends to thrive in acidic, compacted, or poorly drained soils. While iron sulphate doesn’t drastically alter soil pH, it helps counteract moss-friendly conditions over time when used as part of a broader lawn care regimen.
3. Benefit to Grass
In addition to controlling moss, iron sulphate acts as a lawn tonic by supplying iron, an essential micronutrient. Iron enhances chlorophyll production in grass, resulting in a lush, dark green appearance. Healthier grass can outcompete moss, reducing the chances of regrowth.
Application Tips
• Timing: Apply iron sulphate during cooler, damp conditions, typically in spring or autumn, when moss is most active.
• Dilution: Mix iron sulphate with water at the recommended concentration to avoid damaging the grass.
• Safety: Wear gloves and protective clothing during application, as iron sulphate can stain and irritate skin.
By using iron sulphate, gardeners can effectively target moss while promoting healthier lawns. For long-term moss prevention, however, improving lawn drainage, aeration, and maintaining balanced soil pH are equally important.
