Green Care:Self-Watering Planter has a wicking system,that
do the watering job for you. When there is water in the reservior,
the wick draws it up into the soil mix. Your wick is made from
material that will resist rotting and should last for several years.
And your GreenCare indicator shows you how much water is in the
reservior and act as a reminder when it's time to water again.