A block, that placed [config]max block over a Bonsai Pot, could act as a Light Source(replacing the need to have Sky View), and/or a Bonus modifier to growth/drop, like Greenhouse block from ActuallyAdditions.

Maybe even both, a Lamp over a Glass over a Pot, for maximum indoor microFarming! :D

Could be added via CraftTweaker for packmaker, that would be nice I think.

I've just added soils that can give bonuses and that can be fully tweaked with json files and crafttweaker.
Maybe I'll add a light source of some kind sometime in the future, but don't expect this anytime soon.
It might not happen at all.

S'ok, was just an idea like that.
As for the Modifier, I suppose I could make a custom soil that use GreenHouse-type block as crafting ingredient, with custom high value