Q.cutting back of perennials in fall
Cleaning up my garden for the fall and winter. Do I cut back my hydrangeas and hostas? What about astilbes and heucheras?

Here is winterizing information in the articles below for your perennials.
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-winter-care-how-to-protect-hydrangeas-from-winter-cold-and-wind.htm
https://www.gardeningknowhow.com/ornamental/foliage/hosta/cutting-back-hosta-plants.htm
https://www.gardeningknowhow.com/ornamental/flowers/astilbe/astilbe-winter-care.htm
https://www.gardeningknowhow.com/ornamental/flowers/coral-bells/coral-bells-plant.htm