So, to fill that gap, here is the greenhouse mod!
This mod adds a greenhouse with seedling and fertiliser recipe to grow wood.
Requirements: Library.
Recomendations: MCI.
Dropbox Latest: V0.12.1 - 1st June 2016
Note: Config is set as an optional dependancy, even though there are currently no config options for the mod.
There are a few minor changes if MCI exists, such as using nitrogen to make fertiliser.
All "organic" recipes have a random chance on the output.
Making seedlings from wood will give you between 1 and 5 seedlings IF it gives you any at all. there's only a 50% chance you get anything.
Basic greenhouse recipe takes 10 seedlings and 2 water, and gives between 5 and 25 wood, along with 3 to 6 seedlings.
Advanced greenhouse recipe takes 10 seedlings, 2 water and 5 fertiliser to give between 10 and 50 wood, with 5 to 10 seedlings.
Here is a nice simple layout that should work well. Logistics chests not required.
There is a small wire network on the chest there so that the smart inserter only grabs seedlings from the assembling machine if there are less than 100 in the chests. The other smart inserters are to filter seedlings or wood.

