· Brooks Wilson's Answer
· Hi Anne,
Yes, you can shape. By trimming the Coreopsis new growth will come out below each cut that is made. This will create a denser plant with more blooms. Coreopsis blooms on new growth.
Is your Coreopsis in full sun? I have several Coreopsis in full sun and they never really need much pruning. Sometimes later in the season they will get a little overgrown looking and I'll snip them back a little. More shade will cause them to get taller and thin looking.
Hope this helps you.