Scotts Lawn Builder Lawn Food. The start of a year round lawn care programme designed to give the ultimate in lawn care technology. Lawn Builder provides feeding over 8 weeks. Some nitrogen and readily available iron is released quickly to give a greener lawn in just 7 days. Slow release nitrogen then works for up to 8 weeks so the lawn stays greener and grows thicker during those 2 months without sudden surge growth. This is a no scorch fertiliser
