Basil should receive 6 or more hours of direct sunlight a day. Some suggest watering outdoor plants every 4-6 days, but I personally like to check mine every other day to determine if the soil is moist. If the soil is dry I will water them, otherwise I wait another day. In my experience, it is hard to over-water outdoor basil, especially if the plants are in good soil that drains well. For indoor potted plants,...