The answer to 'frequency of weed control' is that most experts recommend treating weeds every 4-6 weeks during the growing season to maintain a healthy, weed-free lawn. This involves regularly applying a pre-emergent herbicide in early spring to prevent new weed growth, followed by spot-treating any weeds that emerge with a post-emergent herbicide.
Maintaining a consistent weed control regimen is important for keeping your lawn looking its best. Weeds can quickly spread and outcompete your desired grass if left unchecked, so staying on top of weed control is crucial. The exact frequency may need to be adjusted based on your local climate, grass type, and weed pressure, but a 4-6 week cycle is a good general guideline.