Today I am going to treat my lawn with Greatgrass liquid lawn food. The instructions on the bottle tell me to dilute 1 part Greatgrass with 15 parts water, then apply evenly. Three hours later the treatment should be repeated, but with a mixture of 1 part Greatgrass and 24 parts water. I have worked out that I need to make up a total of 12 litres of diluted liquid for each application.