The Blender 2.5 growkit is not a tree generator but it will be a powerful and easy way to make both low and highpoly trees with a lot of control!
i use rig’d branches so i can move and scale them very easy.
The leaf’s are placed using hair particles and vertexgroups
my idea is to make a library of leaf’s and branches
and then share the blend. file so everyone can enjoy some nice looking trees (or weeds)
the picture above is just a preview of how the library could look like i used pictures from different sources,
i have to ask them if i can use these images plus i will make some on my own soon.
If you have some good pictures you want to share or just want to say hello please contact me.