Once you've planted the tomatoes, whether in the ground or a container, water them thoroughly. If you live in an area especially prone to cutworms, place collars around the seedlings at this time. This is also the best time to add any stakes. They can be traditional tomato cages, stakes or any sturdy support, including a woven support of branches. Nonmetal stakes or cages won’t burn the plant if they get hot. Determinate types need little to no staking. Other types can be left to sprawl, but getting them off the ground helps prevent foliage and soil-borne diseases and keeps the fruit from rotting or attracting pests.