When And How Often Should You Fertilize?
When to fertilize the grass, and how much fertilizer to use, depends completely on what the grass is used for and its location. Areas that are not subject to intensive wear should only be fertilized when there were signs of poor growth during the previous year. Heavily worn areas require regular fertilization.
If the grass only requires fertilizing once, it is best to do it in spring. In the case of a frequently used surface, it should be fertilized first in spring when the grass needs nutrients most, then in summer to support strong growth and finally in late autumn to give the grass a supply of energy for the following year.