For only one fertilizer application annually, which timing should be considered?

• A. Late fall
• B. Mid to late spring
• C. Late summer
• D. Early winter

Answer: (A)

Late fall is best when you can fertilize only once because it feeds the turf at a time that strengthens roots and stores energy for winter, which improves winter hardiness and sets up a strong spring green-up. As air temperatures drop and growth slows, applying fertilizer then provides nitrogen when the plant can still take it up but isn’t driven to produce heavy new top growth that could be damaged by frost. It also reduces the risk of excessive top growth and fertilizer loss compared to spring or summer applications, making the late-fall feeding the most efficient single annual option for cool-season turf.