Nice composition and framing here. IMHO the pink background is too similar to the flower in tonality to really make the contrast 'pop'. Setting this shot up with a higher contrast color may have emphasized the theme more. The lighting also seems a tad harsh on the flower with some shadows and underexposed areas. Just my opinion, nice shot nonetheless
Good subject choice and color. Are you shinging a red light on the subject, or just really boosted the saturation? I think the contrast against a pure white background might have worked a little better.