Posted: 10/03/2016 at 09:38
Which split, Lyn? Splitting in general? Splitting is usually caused by sudden excesses of moisture, either by watering or sudden downpours. The sudden addition of moisture causes the flesh to swell and the skin, unprepared, stretches until it splits.
There are also some varieties that are prone to cracking, a different thing to splitting. This is cracking:
It's genetic. If the cracks are allowed to widen too much, you end up with the same problem as splitting - infection.