Hey I love your mod. But, as most factorio players I guess, I would like to to place everything ordered next to each other.
I understand why trees can be places without the grid, but could you maybe add like a 1x1 pot for trees where you could put one seed. When you remove the pod you get back the seed.
It could need some Iron, one landfill and after you can place a seed inside :)

I've just updated the mod; trees now place on the grid like everything else.

(This can be disabled in the settings menu for those who want to spam trees all over the place like before)