Suggestions??

Alrighty gals..
I need your decorating experience and advice..

My Mom got me this adorable wall decoration for my birthday.
I absolutely LOVE it!
It's handmade from old fence wood and window trim.
(My parents have a very talented neighbor)

My dilemma..

I have no idea what to put in the bucket!
I'm thinking flowers..
But what color??
Suggestions??