The best direction relative to the sun at which you place your plants depends entirely on the type of plant that you own. For instance, an indoor plant that loves full sunlight will perform best in a south-facing window or any other window that receives a lot of light. Alternatively, there are plenty of other plants that prefer indirect light, meaning that they should be near a window but not directly in it. Additionally, there are plants that prefer low-light settings, which means that you should place them away from any sunlight whenever possible.