Can anyone tell me what flowers are good to plant in May in the northeast?

We have a small shady space that i would like to plant flowers with my 11 yr old daughter. I would apprectiate any suggestions. Thank you!

Answers:
Only anuals till Memorial DAy
Let me know where you are and I can reccommnend a good nusery to get stock at!!

Other answers:
I live in Maine...about the only thing that will do well now is petunias
I live in Maine...about the only thing that will do well now is petunias
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