As of version 1.7.0 Garden stuff has a Candililla crop for growing the wax for its candles.

Ill sneak that in before the next release then. Also I still need a DL link for Millenaire.

Millenaire is here: http://millenaire.org/index.php?l=en
The thing to be wary of with Millenaire is that the player has to learn from the millenaire villagers how to plant the different crops, so I don't know whether that will be inheritable with your crop system.

Whaw, I hope I'll be able to get that workign in my dev env.