SUN SUN SUN: Once the tomato seedling (or any summer garden seedling) is separated into its own pot, it goes in as much sun as I can find. I have a flat of my first potted up tomatoes sitting outside. The air (above freezing) is still warmer than the soil. If the temps dip toward freezing or there is a strong cold wind, I bring the flat inside for the night.
Planting seedlings in a pot : amazon
See more here
You should also see :
build a bench around a tree