In summer, cool season forage growth begins to slow down. Fertilizing pastures and hay after the first cutting in early May can boost the growth of grasses to help get more growth for a second cutting in June.
A general recommendation for fertilizing fescue hay after the first cutting is to apply 30 to 60 pounds of Nitrogen after the first cutting. Moisture is critical to get growth after applying nitrogen. Three tons of fescue hay utilizes about 158 lbs of potassium. As hay is removed each year, it is important to apply potash to maintain adequate levels.
If the first cutting of hay is not until after June 1st, growers may want to consider planting temporary summer pastures to get more hay in summer.