I dont neccesarly agree, I think the steamroom idea would boil your roots if not controlled, so you would have to measure the ammount of steam you're putting in/out.

You also need to think about your ventalation system ( if you're using one of course ). It would suck the steam right out of the room making it useless. I think that your plants would start showing signs of overwatering due to the ammount of steam you put in there and your water ph level.
Joel Reviewed by Joel on . Steam Room Effect A while ago I made a post about using a bottle of water and a heating blanket to make humidity.. With this being said I came up with an idea.. JUST AN IDEA tho.. If I use enough bottles, and enough heat in a small area, the environment will become extremely moist. I figured this would be ideal for the roots. So I'm thinking: Isolate the roots in a "steam room" environment, where the air contains the water for the roots, perhaps ideal for hydrponic growth. The water WILL re-accumulate in Rating: 5