Brand new forum member here, and I have a question that I can't find an answer to anywhere else about potting up. I've started a bunch of seedlings: brandywine red, roma, cherry sweeties, and sweet peppers, and recently transplanted the seedlings into 3" x 3" square fiber pots. All of the seedlings are looking healthy, but some of the larger ones (only about 3.5" inches in height with 4-5 true leaves) are sending roots through the sides and bottoms of the fiber pots already. They're not terribly long roots (yet), but I'm wondering if this is something I should worry about? Do I need to consider potting them up already?
Can anyone help?
BTW: I'm in zone 5 and still have a few weeks yet before I should be planting transplants outside.