178,000 seeds per acre in rows spaced 11 to 20 inches. 154,000 seeds per acre in rows spaced 21 inches or more Based on its research, Purdue Extension recommends seeding rates of (assuming 90 percent germination and 90 percent emergence): 210,025 seeds per acre for rows spaced 7 inches. 163,350 seeds per acre for rows spaced 11 to 20 inches.