Sometimes it is better to plant a few herbs together to save space and make it easier to care for them. To do this successfully, you have to make sure that you group them together properly. Putting Mediterranean herbs like rosemary, oregano, sage, thyme, and marjoram in the same pot is a good idea, as they all come from the same region and have similar growing requirements. There are other herbs that require more moisture, like basil, cilantro, tarragon, and parsley. You can try grouping these together to avoid overwatering. Planting different species of the same herb together is also a good idea.