This is the same file as "Hino Azalea", the next image in this gallery. The only difference is that, after advice from Isabel Cutler, I saved the image with an sRGB profile instead of Adobe RGB (1998). Amazing difference!
I'm glad the mystery was solved, this is a lovely version.
Unlike Sue Anne, I work in AdobeRGB (resize, sharpen, etc.) and then convert to sRGB as a final step before placing on the web. The camera really doesn't care since I shoot RAW, but it gives better color during post-processing without having to make other adjustments.