This is a self watering planter. I purchased 2. The fill hole inside is for the first fill. But after you plant the plants in it there is no way to refill the reservoir. There is supposed to be a fill hole on the top rim for this purpose but it is missing. The manufacturer documents were missing on one but came with the other one and what we got does not match those documents. The manufacturer enclosed a card inviting feedback to someone named Nancy who never responds to our attempts to reach her. We will now have to rig up a fill tube in order to use this as intended. Very disappointing.