Should I Cut Back The Dead Coreopsis Plant In The Spring?

Question

If not in the spring , then when? I didn’t cut them back in the fall.

Answer 1

Yes. Cut your dead coreopsis stems down to the ground if you haven't already. New growth will spring up from the roots.

https://www.gardeningknowhow.com/ornamental/flowers/coreopsis/growing-coreopsis-flowers.htm