How far back do I cut my Black Eyed Susan plants so they will come back next year?

Question

I have a brand new garden landscape installed in May and mt job now is to take care of it. But I don’t know how to prepare the plants for the winter.
Southern Oregon

Answer 1

You can cut back this plant about halfway or more once it has finished blooming, removing spent flower stalks, and a second bloom might occur in late fall. In fall, you can cut this perennial back to 2 inches above the soil line if the plant is diseased or you consider the dead stems unattractive.
https://www.gardeningknowhow.com/ornamental/flowers/black-eyed-susan/black-eyed-susan-flower.htm