I have a new Mexican lime tree with lots of blossoms and fruit but one of the limes is split all the way around the center that starts with a good size black area. All the other fruit looks good. I live in Houston, Tx.
Certified GKH Gardening Expert
It could be lime anthracnose, which only affects Mexican limes. But normally, you will see symptoms on the leaves as well. Are you seeing any leaf spotting?
Lime fruit are also somewhat prone to cracking. This is caused by either irregular watering or poor nutrition in the soil. In limes, where the skin is typically thinner, damage to the skin can make it easier for the skin to crack all around. You can kind of think about it like a water balloon that too quickly gets filled with water or that someone has pricked with a needle.