OR you could actually change the flavor of your bud right before you chop.
About 1-2 hours before you cut your plant down, take some vanilla essence or any other concentrated essence (because juice has too many natural sugars, and could end up growing bacteria in your bud, no matter how soon before chop you do this), and mix it in with water. Make sure your plants are bone fuckin dry when you do this. Take your water, and water the plant. lol, its pretty much that easy. Just make sure you only let the roots soak up the flavored water for an hour or two at the MOST (the preferable time is one hour), and your nugs will have a hint of whatever flavor you choose in their taste. Dont try this with every single plant in your harvest, but try it with one plant, and see how well it works. This is of course if your growing in soil. Hydro is a little more complicated, because you cant really isolate just one plant in particular, because you have to put the flavoring in the rez.
This is taken from instructions that GREENMAN has posted up on his website,
www.seedbankupdate.com . I never tried it myself, but im assuming it works, otherwise he wouldn't have posted it up on his website.
fuckin with your plants AFTER chop wont do anything but make shit harsh, burn horrible, and just fuck up the overall flavor and appearance of your nugs.
Hope that helped man
*edit* -- n as far as changing the color goes man, dont do it. Fdd2Blk did an experiment like this, and while the nugs really looked beautiful, they burned black and nasty, and the nugs tasted like shit. It ruined the smoke itself. So if your just lookin for bag appeal, and dont give a shit how the bud looks, by all means, soak your nugs in food coloring, lol. But if you DO care, and you still wanna try your hand at changing the color of your nugs, go pick up some Humboldt County's own Purple Maxx. Itll stack your budsites closer together, and help you get some nice, thick dense bud, but at the same time, 1/3 of the people that used Purple Maxx have actually had their plants turn purple because of it. The nutrient used to be named "Stacker", but because so many people were reporting that theyre plants were turning purple (the plants werent purp strains), they renamed it to Purple Maxx. Pretty cool eh??