Now that the frost is slowing coming out of the soil, it is time to start thinking about fertilizing your lawn.
How often you fertilize a home lawn depends on your soil type. Most of Calgary has very rich clay soil. Clay based soils hold nutrients very well, unlike sandy soils that naturally leach fertilizers. Properties in the river valleys tend to have sandy soils.
Ideally lawns in Calgary should be fertilized 2 to 3 times a year. The regimen for two applications a year, is late spring and early fall. The greenest lawns are the ones that had a early September fertilizer application. It is a common mistake to fertilize in early April rather than the fall. If you have missed the fall application it is best for the turf to wait until late May.
If you choose to do 3 applications a year, the first should be in late summer. The next application should be late fall, followed by a May application.
If a lawn is in need of repair from neglect or weed problems, 4 applications a year can be used. The first application should be late summer, followed by a late fall application. The third amount would be late spring and the final fertilizer is added in early summer. Add a cool day and irrigation to these application dates and success shall be yours.