next time you transplant water the soil a little and if you have a soft plastic pot then roll is around in your hands a little to loosen it up around the sides(if not then just do the next step i guess) then tip it upside down with your hand at the base of the plant and wiggle it around a little until the bulb falls out. if its rooted well it will all come out together. maybe find a youtube vid on how to do it so u dont have this happen again.