GT Sulphate of Iron 20% Fe is a professional-grade turf treatment used to green up grass quickly, tackle moss, and condition soil by lowering pH. With a high iron content (20% Fe), this fast-acting formulation strengthens grass blades, darkens turf colour, and helps suppress moss effectively when used as part of a wider turf care programme.
Suitable for lawns, sports fields, golf courses, and ornamental grass areas, this 25kg bag is ideal for professional gardeners, landscapers, greenkeepers, and turf care contractors. It can be applied in granular or liquid form depending on preference and is commonly used during autumn, winter, and early spring when moss is most active.
Features & Benefits
20% iron (Fe) for deep green colour and moss control
Ideal for hardening turf and improving colour fast
Helps acidify alkaline soils and enhance nutrient uptake
Suppresses moss growth and conditions the sward
Versatile use – apply dry or diluted in water
Economical 25kg bag suitable for large areas
Applications & Rates
Amenity lawns and grass areas
Parks, golf greens, sports fields
Turf renovation and moss control
Autumn, winter, and early spring conditioning
Application Rates:
As a granular moss treatment:
Apply at 35–70g/m² on dry grass. Do not mow for 3 days after application.
One 25kg bag treats up to 714m² at 35g/m².
As a liquid feed:
Mix 4–5kg per 100L of water and apply at 500L/ha using a sprayer.
Always water in if rain doesn’t fall within 48 hours.
When to Apply:
Best used during cooler months (Sept–April) when moss thrives and turf needs strengthening.

Specification Details
Product Name GT Sulphate of Iron
Nutrient Content 20% Iron (Fe)
Format Fine powder/granular
Application Rate (granular) 35–70g/m²
Application Rate (liquid) 4–5kg per 100L water per hectare
Coverage Up to 714m² per 25kg (at 35g/m²)
Container Size 25kg
Application Method Spread or dissolve for spraying
Usage Period Sept–April (cool seasons)