I'm not a soil grower but it sounds like its time to transplant. Wait for one of the soil pros to chime in. When I did grow soil(once) I found it easier to transplant while the medium is dry so it can slide out of its current pot. The I would water the new medium about 2-3" from the newly trans planted stem so the roots can "search" for the water. Again I'm a hydro grower so WAIT FOR THE PROS. At least until tomorrow