Answer: No problem, just move them up in pot size. It doesn't have to be anything fancy. In the past I have been in similar predicaments, cut the tops off of 2 liter bottles, poked holes in the bottoms, ran them through the dishwasher, and used them for a temporary tomato pots. If you go up one container size, they should be fine for the additional 3-4 weeks. We should all have seedlings that grow so enthusiastically!
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