Just leave it like it is, your plant will be fine and will not need any sort of bandage or other "remedies".
She will grow and flower just like normal and without ant ill affects.
It is best to let air get to it and dry it out, bandages can cause excess moisture underneath them and then cause problems with fungal or mould attacks.
Wrapping wire or zip ties, can over time, strangle the stem as it grows and kill the plant.
This split will not cause any reduction in yield, growth or potency.
Hope this helps, Organoman.