Thanks Aev! She's one of mine (says the proud dad).
I started off with a black background. This, in my opinion is the best way to shoot weed... it isolates it, and gives us what we want... weed
That said, one could just use window light and get a great effect. For this one, I decided to use some artificial lights. There is one directly overhead, one behind and down a little bit that has a blue-ish gel, and another light that was right by my camera that had a warm, orange-ish gel over it to help get some detail in the shadows and help with the "grapefruit" effect. For people that don't have strong lights, it will help to have a very dark room with no light contamination from outside sources. It also helps to be able to control the power of said lights so they are brighter/dimmer based on your needs. Pretty basic principles, and a little creativity will take you a long way. Hope that helps!