Automatic Watering Globe

A couple of days ago I was pondering the problem of container plants drying out and wanted an inexpensive solution to ensuring houseplants were adequately watered when we are away.  Houseplants are as problematic if we are gone for 2 or 3 days but outdoor container plants can easily become too dry in the period of a few hours.  I recently wrote about a gravity fed watering system that I am