By Andi Anderson
The timing of the final alfalfa harvest can determine how well fields survive the winter, and Ohio State University Extension specialists warn that this year’s dry weather makes the deadline even more critical.
The Ohio Agronomy Guide recommends wrapping up the last cutting by Sept. 7 in northern Ohio and Sept. 15 in southern Ohio, giving plants enough time to regrow to about eight inches before a killing frost halts growth.
Adequate fall regrowth allows alfalfa to store sugars and carbohydrates in its root system, which fuels winter survival and supports a healthy spring crop. The above-ground biomass also shields the crown, helping to trap insulating snow and reducing the risk of frost heave caused by rapid freeze-thaw cycles.
“Taking a fall harvest will provide feed this year, but often at the expense of next year’s spring yield,” OSU Extension forage specialists caution.
This year’s dry conditions add urgency. Limited rainfall has stressed plants and slowed regrowth, making it even more important to protect stands heading into winter. Cutting too late depletes energy reserves when plants need them most, leaving fields vulnerable to winterkill and reduced yields next season.
Growers are encouraged to monitor local forecasts for the first hard frost and to leave enough time after the final cut for robust regrowth. Maintaining a protective stubble height and avoiding heavy traffic on fields during wet periods can further safeguard crowns.
By respecting these September deadlines and allowing plants to rebuild root reserves, producers can improve winter hardiness and ensure stronger forage yields next spring—even in challenging dry years.
Photo Credit: gettyimages-gabrielabertolini
Categories: Ohio, Harvesting, Rural Lifestyle