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[rowenlemmings]

so I mined out a large-ish area and caused a cave-in to drop some above-ground trees into my fortress to farm safely, but noticed when the terrain dropped that all the trees went poof.

Will they grow back?  Is this a viable method of safely harvesting wood?

[martinuzz]

Normal trees will not grow underground.
If you are looking for underground trees, that would be tower caps.
Tower caps only grow on maps that have either an underground river or an underground pool.
Once you have discovered one such feature (your miners breached it), tower caps will grow on any muddied tile underground.

[rowenlemmings]

Normal trees will not grow underground

Define "underground."  The earth that I dropped (via the cave-in) down a Z-level is "Outside Light Above Ground"

[Rvlion]

When the ground you are trying to grow trees on is soil they will definitly grow again (but it might take a while).
However if the ground is rock I have never seen it happen even if you have Outside Light Above Ground.

Note. Next time cut down all the trees in that area first, the logs with survive the cave in while the trees dont.

[rowenlemmings]

When the ground you are trying to grow trees on is soil they will definitly grow again (but it might take a while).
However if the ground is rock I have never seen it happen even if you have Outside Light Above Ground.

Awesome, that's all I needed to know thanks :-)

[Firnagzen]

...

You know, unless someone else has come up with this before, you've just invented a way of growing trees in a safe area without the benefit of an underground river or pool.

You, sir, are awesome.

[rowenlemmings]

It would (deeply) surprise me if no one in the history of Dwarf Fortress had thought of collapsing the above ground into their fortress to harvest trees.  There are MUCH stranger things out there than that.

[Firnagzen]

True dat. Thanks for bringing it up, at any rate.

Also makes it easier to flood with magma to incinerate shrubs.

[rowenlemmings]

Well it's been a couple years now and no new saplings have sprouted on my collapsed earth forest.  I'm thinking this may have been a lost cause...

[winner]

did you collapse a full Z level of soil or just thin soil floor tiles.

[rowenlemmings]

I collapsed a floor tile of soil onto soil below.

[UndergroundTree]

bit of a dig, but I was posting a thread like this, and I only just now found it with search. Its still in the same month right? 



http://www.bay12games.com/forum/index.php?topic=42647.msg788595#msg788595

[Ziusudra]

My moat, which was channeled, has saplings growing in it. So, dropping isn't needed; if soil is channeled the floor left behind will grow whatever would grow on top. As long as you don't place actual Farm Plots, which prevent natural growth.

It is spring of 203, so it took a couple years.

Is anything growing? Grass? Shrubs?

[Quietust]

From what's been observed, outdoor trees only grow if there's a sufficient amount of unexcavated soil walls underneath them which, from my own experience, seems to be at least 1 tile within a 2 tile radius (that is, the same criteria for willow trees growing near murky pools and rivers/brooks), possibly more.

[Hague]

Technically, with modding, it is possible to make trees grow on mountainous terrain. The trick is that there are no trees that exist in [BIOME:MOUNTAIN] so if you add that token to a particular tree, it will grow on muddy rock in a mountainous environment.