On Thu, 17 Mar 2011 21:39:24 -0400, Gary Brown wrote:

Hi,

We will be away for a while - much longer than our houseplants
can go without water. Is there a watering mechanism that will
work for three weeks so we needn't have anyone come in?

Thanks,
Gary

I use one of these:
http://www.gardeners.com/Green-Geniu...efault,pd.html

I put my plants in one area, put the tubes in, turn it on and leave,
sometimes for more than a month.