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[aepurniet]

quick question (for anyone that has done this before). i was planning on making a large above ground fort, but to do it the dwarfy way i would like to make a huge square obsidian casing and then mine out the fort.  this will make the floor of my fort obsidian.  can i farm above ground plants on obsidian?  i think it will definately have to be irrigated, but im not sure even if i do, it will work.

its a bit of a complicated setup, as i want the obsidian mold to go through the 2 level aquifer also. i would like to know whether to reserve some space for above ground crops that will not be part of the casing before i start this (born to fail) fortress.

[Jacob/Lee]

Obsidian is a stone, so unless you irrigate it first you won't be able to farm on it.

[aepurniet]

yeah i figured that, just not sure if it will work even if i do irrigate it (ebeing an outside plant, planted on stone never really seemed to work for me in 40d)

[gtmattz]

If the biome in which your plot is in supports above ground plants, you should be able to plant there.  If you embarked on a mountain, none of the area in the actual mountain biome would work for example (which is what was causing your previous issues I suspect).

[aepurniet]

cool beans. thanks. preperations are already underway.