At first, there will be very few weeds in your new lawn. Over time, weeds will sprout, making fertilizer coverage paramount. if you see weeds in just a couple of areas, regular mowing can take care of your issue. A strong, sharp mower used on well-fed lawns will keep most weeds under control.
Rotary mowers can handle tall grass with ease, but if it is not kept sharp, you will run into problems. Sharpening the blades before each usage is critical. Reel mowers are another type of mower used, and have several blades and can reduce the appearance of fungus.