Drainage holes are important so you don't leave your plants standing in a pool of water. For some plants, this is a death sentence as it could lead to root rot and other diseases that can be fatal for them. This is why you should choose a stone planter with a drainage hole. However, add stone planters of the not feature to a drainage hole. For some, you can quickly drill one at the bottom. If that's not possible, you can use these stone planters as cache pots. That is, you put your plants in plastic pots with drainage holes and then put the plastic pot inside your stone planter. However, if you've been gardening for a while and you are confident with your watering, you may still plant directly into stone planters. Choose plants that are forgiving when you overwater them and be sure you have a well-draining medium to pot your plants. Also, make sure that you have the appropriate pot size. Putting your plants in a large stone planter means that there is excess moisture that may take a longer time to dry out.