To grow, lavender requires warm conditions and full sun with moist soil. Very cold weather or very wet soil will result in the loss of the plant. The good news is that once the plant is strong and well established it becomes very hearty and can grow in many conditions. The plant grows best in tight spaces that are moist but not damp and in pots or spaces that allow for root growth and air flow. If you do not have the luxury of a consistent climate all year round, planting lavender outside during the warm months and moving it inside in the cooler months allows you to have it all year round. Growing lavender in pots indoors allows for more consistent climate control and a better long term result. Compact variety seeds are the best for indoor planting.