I would give them another week and then plant up to a 4" or 6" container with good potting soil. Tomatoes are warm season plants and do not like cold weather/soil. Put under lights after transplanting and start hardening off when overnight temps are 46 degrees F or 8C. Plant out when daytime temps are in at least 70f/20 degrees C. You will also need to cage them or support them as they will sprawl and not do as well. Good Luck!
