A1 Lawn Ultimate Spring Summer Fertiliser – 10kg (280m²)

This spring and summer fertiliser from A1 Lawn is designed to wake your grass up after the colder months and keep it looking its best right through to late August. The 10-4-4 NPK ratio puts nitrogen at the forefront, which is exactly what grass needs during its active growing season to produce that rich, dense, dark green coverage most gardeners are after. Phosphorus supports healthy root and shoot development beneath the surface, while potassium toughens the grass to better withstand dry spells and general wear.

What sets this feed apart is the additional ingredients worked into the blend. Iron gives the lawn a noticeable colour boost, magnesium improves how efficiently the grass converts sunlight into energy, and seaweed extract helps condition the soil itself, making nutrients more available over time. The granules are homogeneous, meaning every pellet carries the same nutrient balance, so you get an even result across the whole lawn rather than patchy growth. One 10kg bag covers up to 280 square metres, and there's no mixing required — just spread and water in, or apply ahead of rain.

Produced in the UK and certified by DEFRA, FERA, and SASA, this is a genuinely professional-grade product that's been formulated to perform in British conditions rather than adapted from a continental formula. It suits anyone from a first-time lawn owner wanting a reliable seasonal feed to a more experienced gardener looking for consistent, measurable results. Apply any time from March through to August for best effect.