The left 3 saplings don’t have enough space between them to grow; the leftmost one is 1 tile too close to that raised aether brick and the middle 2 are too close to the pylon.
However I actually can’t see what’s wrong with the placement of the rightmost sapling. It looks to have enough space on both sides (since other saplings don’t impede other saplings from growing) and overtop, it’s placed on stone, and it’s below the Surface layer.
Try using Fertilizer on the rightmost sapling to see if it’ll grow and has just taken a really long time for some reason, cause it really looks like it should be growing. If that doesn’t work, try building out a few tiles with stone over the Shimmer to see if for some reason it needs more ground space to grow.
11 Comments

Redit.
i always assumed they needed light so maybe try that? i might just be stupid tho
Is there enough space above? Edit: Also, how long have you waited?
[deleted]
You need to sing that song from the lorax
Try using fertilizer. If it doesn’t grow, something isn’t letting it.
I’m glad that they aren’t growing.

They grow slower than normal trees also maybe the ceiling is stopping them but idk if there’s other issues
i think they each have to have 2 spaces on each side, so four spaces between each tree.
Here’s the wiki.gg page showing the growth conditions for gemcorns. Always a good idea to check the *official* wiki first if you have game questions.
https://preview.redd.it/6ov731x07psg1.jpeg?width=1080&format=pjpg&auto=webp&s=b52082f171d72634046faf460b14f80a5975f429
The left 3 saplings don’t have enough space between them to grow; the leftmost one is 1 tile too close to that raised aether brick and the middle 2 are too close to the pylon.
However I actually can’t see what’s wrong with the placement of the rightmost sapling. It looks to have enough space on both sides (since other saplings don’t impede other saplings from growing) and overtop, it’s placed on stone, and it’s below the Surface layer.
Try using Fertilizer on the rightmost sapling to see if it’ll grow and has just taken a really long time for some reason, cause it really looks like it should be growing. If that doesn’t work, try building out a few tiles with stone over the Shimmer to see if for some reason it needs more ground space to grow.