Certain types of grasses have specific height requirements. If you maintain your lawns ideal height, it will reward you with a healthy, lush turf that will fend off weeds, drought and disease. The myth of “…the short the grass, the less you’ll have to mow…” is the foundation to a problematic lawn. Mow you grass to short and it becomes susceptible for heat damage and a weed invasion. Likewise allow it to grow to tall and you create a breeding ground for insects (mosquitoes, flies, etc.…) and critters like moles, mice, and snakes. Every 5-7 days is ideal during peak growth, and will ultimately vary with the seasonal growing conditions.
The rule of thumb is to never cut more than a one-third of the grass blades total length. Allow your lawn to grow taller during summer months; during droughts and in shady yards. Mow it shorter in the spring to remove dead grass and in the fall to prevent snow mold during winter. Heights for warm region grass are: Bermuda: 0.5 to 2.5 inches; Centipede: 1 to 2.5 inches; St. Augustine: 1 to 3 inches; Zoysia: 0.5 to 3 inches. And for cooler regions: Fine fescue: 1.5 to 4 inches; Kentucky bluegrass: 0.75 to 3.5 inches; Perennial ryegrass: 0.75 to 2.5 inches; Tall fescue: 1.5 to 4 inches. Research seasonal exceptions based on your region for these guidelines by contacting your local county extension office or call your favorite landscaping company (us!).