I like your cropping. Your shot almost evokes alternative forms in its ambiguity, but I never stop seeing just the rose, however gorgeous. Also I think Weston would have kept everything in focus. There is too much sense of depth versus Weston's flattening to abstract form.
This is beautiful, but from what I know about Weston, he used small apertures and long exposures to achieve deep depths of field. Not knocking you for that, though, since this is so pretty.