from what i understand.

2 weeks before you pic it you flush your grow medium for 1 week.
the second week you water it with your flavoring.
like those frozen juice mixes, like welches grape mix you get in the freezer section. make it like you would if you are going to drink it. and water those girls, they will absorb the flavor.
I have not tried it yet but plan to. I will let you know if my bannana split MJ tastes great. roflmao