I have a couple of newish chili plants growing in pots on my windowsill, they're about 15cm or so tall and seemed to be doing well enough so far. However, this morning I've noticed that the stem at the base of one of these plants has split open from just above the soil to about 2cm up the plant.
Here are shot of the whole plant with the split highlighted:
Why has this happened?
Can the plant survive and be healthy?
If so, there anything I need to do to 'help' the plant?