I think this definately meets the challenge. My only suggestion might be a tighter crop, perhap focusing a bit closer on one than a general shot of many. Just my opinion:)
Many, MANY flowers contrasting with leaves. Okay, that's new this round. The angle of shot seems strange somehow but since I can't quite put my finger on why I guess that's not the world's most helpful comment.
good complementary colors... I can't really muster up much to say on this one... there is no compositional theme to comment on.. the color is the primary composition... so, its a good photograph about color :) = 6