Trees

[Sephiroto]

I see trees growing.  But where's the rain?  Or is there a magic gardener that sneaks out and waters them once a week?

[Marc]

Underground water source drawn from the roots?

Vivaduan?

Slave with a watering-can?

Tek or Muk wills it?

Who knows?  Who cares?

If you do, take ic action and find out, but there is a reason.

[krelin]

A lot of trees in the real world are capable of capturing moisture from the air around them, and surviving on that, even in extremely dry climes.  May also be true of Armag-trees.  Underground sources might also help

[Gorobei]

A wizard did it.

Same way cactus' grow probably. At night and dawn the moisture that evaporated during the day then condenses on the plant, feeding it. This way the plant never needs to be watered.