Your peony should not be dormnt until November, and we should have rain by then. An established peony should get along OK through the summer on about an inch of water a week. Al

I know, im just trying to plan ahead. Im going move stuff around when everything goes dormant and need to plan accordingly... so do I water them as usual in the fall/ winter or less or...?

Maintain your watering schedule until the winter rains and dormancy make it unnecessary. All this time since flowering the foliage is feeding the roots for a bigger and better plant next year. Al