Need a little help ensuring that your green tomato plants grow into juicy, red balls of deliciousness?
Roots: It is very beneficial to re-pot tomato starts at least once before transplanting them into their final outdoor location.
The first transplant: Once the start has two sets of leaves and the plant is 3-4 inches tall, re-plant the start just under the lowest set of leaves.
More transplants: You can transplant your tomato again (and again) once it reaches 8-10 inches in height, before you plant your tomato outside.
The final transplant: The transplanting of your tomato into it’s outdoor growing location should be done using a similar method of burying the stem above the current soil level.
Read the rest of Oaksford’s suggestions at DIY: Transplanting tomatoes (again and again).