best way is from the inside out... using pure or imitation extracts... stay away from sweetned juices, the sugars make it taste like shit, plus the plant has its own sugars and starches and as the buds cure, i think youl be satisfied... depending on how big your container is / how big the plant is... i do it with my 12/12 from seed plants just a little flavor in each pot, you may have to play with it to get the taste you want but...
i wait 3-5 days b4 harvest, starve her of water (may be kinda hard outside) wen the soil is dryed and light i take a premixed bottle and add it to the pot 1-2 hours before chop. starving her of water makes the roots search, and it being dry like that, wen the mix is added, the roots draw it right up, 2 hours is plenty time for her to get the flavor/smell
i got little 6x6" plastic pots and i use the following..
1 - 20oZ bottle of water, not bottled water just use for measure
and in all reality its only 16-18 oz's, its 3/4 full
2 - 1FL OZ bottle of desired extract... food lion/walmart/publix has varietys to choose from. i use orange and rasberry, would like to find some bluberry... i dont think they make it
i just mix the 2 bottles of extract with 16 oz of water, starve the plant 3-5 days, and give that to her an hour before i chop.. that proportion works for me, like i said, you may have to play with it to get it like you want. peace