It would be good to have like, an exact breakdown of what is different between our cultivation space and the Dwarves' cultivator grotto, and chart them. I think we already have fairly exact details, it would just be worth bringing up everything we've found so far and putting it together.
Like, it might be to do with the orientation of other things next to it, so there's not as good a "channel" running to the cultivation zone? Or maybe something weird like, IDK, we need to drill a small hole through the rock so it's like a fairy-stone, or something. There's a lot of possible avenues and most will be wrong.