You do not water these porch pots. Nothing is "planted" in the dirt, so no need to water them. In most of my other winter porch planters I make you will water them one time when you initially make them and then maybe once during the winter after that. Again, nothing is actually growing in those porch pots either, it's more to give the cut branches a drink during the winter and the frozen water also helps to keep the branches in place in blustery winter weather.