Bleeding heart plant

Question

What do I need to do to get it ready for winter?

Answer 1

Wait until the stems and leaves wilt by themselves, then cut them back to near the base.

This plant is hardy down to zone 3, so plants in the ground don't need winter protection in most places. In locations colder than zone 3, mulch to protect the roots:
https://www.gardeningknowhow.com/garden-how-to/mulch/mulching-plants-in-winter.htm