Photoshop Help

I have a few photos I want to tweak this photo similar to what I saw on this site. For example, this included photo, I want to take (1) blossom and leave it full color (natural color), and the rest black and white or sepia. I have some better shots, but this is an example. Can anybody help or send some links? Obviously this is shrank down from the original 22 Mb file. I know it is something about filtering, but never really played with it.

open in ps
go to image > adjustments > desaturate
then use history brush tool over what you want in color

voila!

Joe that worked great, thanks for the tip (I've wondered how to do that too).

Hey Joe, that was awesome. Any way to "desautrate" into a Sepia type filter, than history back.

Working on it...

One more

those shots look amazing and thanks for asking the question. did you figure out how to get into sepia?

and this is what i ended up with

Yhea I used Image/adjustments/camera filters/sepia - Than could history back.

Love that shot of yours

Here's the one I did (moonrise at Bullards Bar)...

What an amazing tool this is

I love it. it can turn a ok looking picture into an amazing one