The most flexible and multi-purpose of all lawn mower styles, the 4-wheel rotary mower is also the most popular design of lawnmower available. Due to its 4-wheel design, it can accommodate grass types ranging from the formal lawn to rough orchard and anything in-between, making it an ideal choice for homeowners with mixed gardens. Designs today range from straightforward cut-and-collect lawnmowers to dedicated mulching mowers that will return grass nutrients back into your lawn. It is even possible to buy hybrid 3-in-1 4-wheel mowers that offer mulching, collection and side-discharge functions in one machine.