It shows that the seeds can be planted on fulgora, however neither seeds or artificial grass actually can be used there. Which part of this is a bug i don't know.

Hi, this is a side effect of 'Invasive-forestry' and support for some planet mods. (pressure requirement changed from 1000 to 800-2000)
The tooltip is based on Planet-pressure being 800-2000 (Nauvis = 1000, Fulgora = 800)

Not being able to plant on Fulgora is intended by the tile restrictions.
- There is a chance Bonsai-seed will be able to grow in harsher conditions, like desert or sand tiles, or even some Vulcanus or Fulgora tiles, but this is a work in progress.

Artificial-grass needs an inclusive list of all tiles it can be placed on (this is due to previous bugs, which allowed it to be placed on space platform).
By design you should be able to place it on Nauvis and by option Gleba as well.
You have to remove concrete to place it on viable tiles under concrete, this is to prevent, cheating the tile on Aquilio.

PS: If you need wood on Fulgora, Zen-Garden is your option.

Oh, okay
Hmm, maybe you can add requirement of electromagnetic activity like < 90? (fulgora afair is 99)

Yeah, good idea, will check more planets for compatibility and add secondary surface condition to better match the possibilities.

Hi, I checked most of the planet mods and tweaked the numbers a bit.
Fulgora should be hidden except for Bonsai-seed, which might be able to live there but not implemented yet.