A better approach is to plan for both forage and seed production on a long term basis. If seed was the primary or only commodity, the fescue would be grown in rows like corn, soybeans or wheat. Realistically, forage is the primary crop. The management needs to be such that a respectable seed crop is also produced on a regular basis. The first thing to do is take a soil test.
Nutrient availability is a critical factor in forage and seed production.
It is controlled by soil pH and the amount of nutrients in the soil. A soil pH of 5.5 or above needs to be maintained. If lime is needed, it should be applied as soon as possible to allow for activation in the soil. Nitrogen is primarily responsible for how well the seed heads fill. Phosphorous and potassium should be maintained at medium to high levels for better tillering.