Seasons of selling?

[Lee Haenschen]

A investor friendly realtor I was talking to the other day suggested that I pay close attention to the seasons of buying & selling. He was telling me to make sure that I don't put any houses I purchase back onto the market in the fall or winter. That late spring into the summer is the hot selling time and that if I can't have a rehab done in time for a spring or summer sale to not do the deal or hold onto the deal a little longer.

Is this something you all take into consideration?