I recently started planting a bunch of maple seeds that I found a few blocks from where I live, soaked them for 24 hours, stratified them in the refrigerator for approx. 3 months and planted them all (total of about 46 seeds, 37 germinated, 9 not germinated). In a matter of 1 week most of them are approx. 2" in length with their first set of leaves!
A few of them are more advanced than the others and I've noticed they have bumps on their stems and their root(s) are pushing out of their pellets. Are these bumps possible branches? And should I transplant them into bigger containers or are the exposed roots not harmful for my seedlings? Thanks so much to anyone that can help answer my questions.
-I also live in an apartment with limited space so I cannot plant them in the ground only in pots. Below are some pictures I took to show the things I mentioned above. The last picture is my biggest of them all.