Yes, lavender plants need 6 - 8 hours of sunlight per day, so make sure the pots are placed in a sunny area. Shaded plants will not grow as well or produce as vibrant a fragrance. Make sure to watch plants in a lot of direct sunlight, however, to make sure they are not overheating. Soil should be allowed to dry out between watering, but the plant itself should never be allowed to wilt. Plants in small pots will need more frequent watering, since the soil will dry out faster.