Apple blossoms:

Large: http://www.pbase.com/image/28606562
Cherry blossoms:

Large: http://www.pbase.com/image/28606447
I have been shooting flower macros from about five feet away with a zoom lens set to 300mm... used ISO 400 because camera is handheld and there's usually some wind. I have better luck with my telephoto zoom that I did with my macro, and this method has the advantage of not having to get really close...and no crawling in the dirt either!
See more at http://www.pbase.com/pstewart/flora