Exotic Greenhouse
Luminous glass walls and dark wooden tiles
Moss wall decorative frame (made with round, fluffy moss)
Lichen wall decorative frame (this one contrasts with the moss by looking very sharp)
Nepenthes pitcher plant (this one can be found by green/lime pets, but a few colour variants and rarities would be available as pitchers can be deep red, green, yellow, purple, white, etc.)
Venus flytrap
Cobra lilly (these can also have some intricate patterns on them and there's different shapes too!)
Wooden flower shelves
Wooden ladder
Anything that's glowing, like decorative glowing driftwood would fit nicely as a decoration in there. Not sure, I think this phenomenon is called foxfire? Kinda like that :)