How long should your breeding season be? The cattle business is amazing in its diversity of geographical locations and management styles. Every ranch must adapt to their environment and resources and strive to be a competitive producer of calves and feeder cattle. One of the many decisions to make each year is, how long should your breeding season be? One quick answer is, not much different than last year. Cows will need 30 to 90 days after calving to get themselves ready to conceive again.