Control the Weeds or Start Over or Both
It has been stated many times that a healthy, vigorous lawn is the best defense against weed invasion. Thin lawns and bare areas are the most common reasons for increased weed presence. Determining the reasons for a lawn’s sparseness or lack of vigor is the first step to managing the encroachment of weeds into the lawn. Table 10.6 lists a few causes for thin and sparse lawns. Figures 10.17 and 10.18 are two illustrations of the same conditions.
Table 10.6. Thin and Sparse Lawns
Sparse and bare areas can be caused by many reasons. Some of the more common ones are:
Figure 10.17. Thin and sparse lawn – sunny area.
Figure 10.18. Thin and sparse lawn – shady area.
If the lawn care practices of mowing, watering, fertilizing and herbicide application have failed to reduce weed populations to less than 40 percent of the lawn surface, renovation may be the answer to restoring a healthy lawn. Table 10.7 discusses some things to consider before beginning a lawn renovation project.
Table 10.7. Criteria for Lawn Renovation
Renovation should be considered if any of the following conditions exist in your lawn:
If it is determined that renovation should occur, see Chapter 6 Renovating an Existing Lawn to Achieve Sustainability for step-by-step renovation procedures.
Proceed to In Closing