Nice colours. It was an overcast day, wasn't it? No strong shadows, which is good. The "natural diffuser" up there in the sky works best for natural light flower photography, I think (unless you mean to creatively work with the shadows).
You won't get too many comments on flower photos on here any more, I'm afraid, since too many here have already seen too many flower photos by now (but I still take some every now and again, I just can't keep away from them! ).