In NE Ohio, I close Oct 15-30 and soft open April 15. I ensure that closing and opening water temps are <60 degrees. I raise FC to half SLAM and use PQ60. For last three years, I open to FC >2. That is 6 months on PQ60 and 1/2 SLAM FC.
If you cannot close and open when pool water is <60, PQ likely won't make it. Since you likely cannot meet this criteria, you should add chlorine during the closed period. Drop a sump pump in the pool and add chlorine slowly over the sump to circulate. Let the pump run a while after.
It will work if pool water stays below 60 from close to open.