Astro, I used the method from  nattarious to do my first entry, simply because trying to paint a mask around foliage is almost impossible and terribly time consuming. Can you tell me what method you used for the sun shot?

Bruce said to go ahead and share methods and thoughts on selective coloring in this thread.  So, I will share a few from my personal opinions. Some apply to your entry.

1. Be very careful in what image you choose to use selective color.

2. Use selective color on only a very few colors and be sure those fit the final render.
3. Do not over saturate the color part but perhaps slightly desaturate it to make the final image appear more natrual and not focused on a central color that might seem somehow out of place.

Your image uses the technique is such a subtle manner I do not notice that selective coloring was used in first view. To me, that is a good thing.  Creation of a pleasing image more than a shock of color is to me more viable.  Of course, in some shots like the  Bennetor rose against a white background or the "mountain dew", the color is not shocking at all but works.  The soft drinks could easily be used in advertising and are appealing as "is" simply from the total effect of the image and the transparency of the soft drinks with the color.

Just a though or two.       Tom.