I'm still new to this but here in Kansas we will start somewhere around late April.
I know there is a magic water temperature number that you are looking for but I don't know if it is 60* or 65* something in that area.
I also know to quit feeding in fall when the water temperature drops below that number.
I have come to realize that everything I speak with my pond management guys about is more in weight and temperatures, Not as much
about numbers and times of the year.
I.E. - In your case. You have taken out X number of fish, Is that 20lbs. or 50lbs. Same thing with the Calendar. Weather conditions are different all over the USA
It will also take a couple of weeks until you notice the fish feeding, Do it in the same place at the same time of day, every day