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The problem of splitting fruit often occurs in the early fall. At this time many varieties of citrus are mature in size and the peel is not expanding. If heavy rains occur, the roots absorb the water and force it into the fruits. The peel cannot expand and as a result splits. Hamlin, Valencia, Murcott, and younger trees are more prone to splitting than other varieties and older trees. To reduce the chances of this occurring, be sure to water citrus once a week when rainfall is lacking and fertilize as recommended to produce a tougher peel. Additional Resources
http://edis.ifas.ufl.edu/HS141
