As a first time gardener, I went against all recommendations and started tomato seeds too early! It began as an experiment to see if I could grow tomato transplants from seed using what I already had at home. If they were successful, I would know better than to buy extra seed starting materials when the time comes. For me, that time was going to be Feb. 28th as our last frost is between March 30th & April 30th in zone 7. So, I'm about five weeks too early. Lo and behold, they are under a lamp and growing quickly! I want to see if they can make it until I'm able move them to raised beds outside, just to continue the experiment. They are in solo cups at the moment and I only want to pot up once before mid April. What size pot should I get? I'm just not sure how large they get in that amount of time. Or, are they doomed for failure and I should start over in four weeks?