It’s important to remember the 1/3 principle when it comes to lawn care. You should never cut your grass more than 1/3 of its original height at any time. This could cause trauma to the grass and result in discoloration. The perfect height for the grass in your yard depends on the type of grass and the season. Different types of grass thrive at different heights, and all grass should be kept longer in the summer to help cut down on water usage. Higher blades of grass helps prevent water from evaporating as quickly, allowing you to save some money and still have a gorgeous yard.