Fellow Gardeners, Aaron need some advice.

@Isharell re trees not growing inside. If you make walls medium height or higher, then trees will grow inside in pots or ground (or outside year round ‘sheltered’ under overhanging roof). I’ve also seen the trees growing in a two storey atrium in a very impressive build with stairs and walkways surrounding the atrium with an amazing garden that was a mix of edible and decorative plants. I am currently starting an apocalyptic challenge, living completely underground with a glass roof to some of the complex and medium height walls. Using no mods in the game, I have an apple tree growing because you start with just one of each (fruit, vegetables and herbs) of the seed starter packs as well as one insect or bee hive.