Subject: Why/How does sugar affect the travel of dye through transpiration?

I used food coloring and 1 cup of sugar in about a cup of water.  The flowers 
I used were carnations.  The flower with the sugar in the water did not change 
colors.  I think it is because the sugar plugged it up and it has a more dense 
molecular structure than the plain water but can't find anything to tell me if 
I am right or why it didn't change green.  Any help would be appreciated.  
Thanks.

Re: Why/How does sugar affect the travel of dye through transpiration?