Larger numbers of weeds can usually be controlled with an appropriate herbicide. However, this may only provide temporary relief. If your soil has not been tested in the last 3 years it is recommended that you have your soil tested, whether you have a few or many weeds. The results will tell you the soils pH for most lawns in Newfoundland and Labrador is approximately 6.5. Typical unlimited soils in the province have a pH between 4 and 5.5.
Dolomitic limestone is normally what is recommended.
Fertilizer is usually applied in spring, mid-summer and fall. Soil test results will state when to apply, the amounts to apply and the type to use. Normally in spring and mid-summer, a slow release fertilizer high in Nitrogen is recommended. A lower nitrogen fertilizer is usually recommended for the fall. It is preferable to apply the limestone first to give it a few days to wash down into and attach to the soil before you apply the fertilizer.