coreopsis

My coreopsis are in full bloom and beautiful, but not as plentiful as last year.
I'm a beginner gardner. I think they need to be divided??? When should I do this?
In the fall or spring??

 

Spring.

 

Thank you Ron, for your information. I'll do it in the spring.

 

For best results, you can eliminate the faded flowers.

 

Hi Iaia,

Thanks for your response.

I have been deadheading them, and that's helping but I really think it's
time to divide them next spring as Ron suggested.

thanks again!