I don't usually do this type of effect with my photos but I was in the mood to play around so I decided to experiment with duplicate layers.
I started with a ho-hum picture that I took of a lone dandelion in my yard:
In CS5, I duplicated the original layer 13 times (whew!) and erased everything from the duplicate backgrounds except the dandelion. Then I moved my 13 duplicate dandelions into a heart formation and I flattened the whole image (layer>flatten image). I added 2 textures: White Oak at blending mode "saturation" and a leaf texture that I found HERE at blending mode "soft light." I slightly adjusted both layers then erased the texture from the dandelions. I also used the patch tool to get rid of some of the brown grass and leaves. Finally, I added the text.
Honestly, I'm not really sure if I love my end result. I mean, it's definitely better than the SOOC but I think I may have gone a little overboard on the editing because I was having so much fun with it. That happens sometimes.