I love the composition of the tulips but I think you should have a diiferent background color. The greens look ok with it, a little yellow, but the purples are dulled. I think more of a blue light would help as well.
This is a lovely shot with fabulous light and composition. Maybe would of cropped a lil more off bottom but can see would of cut off tulip which would be worse.
With studio lighting the true color of the tulips do not seem to come through. The subject's stance is excellent though as is its juxtaposition with the background!
I like this different arragnment of the tulips. I think the light is too direct and washes out the colors a little too much. Still it is good to look at.