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It doesn't matter what I do, my Cherry tomatoes always seem to have many of them crack when/as they ripen. I have tried everything - more sun, less sun, more water, less water, different varieties etc. It only seems to happen badly with Cherry tomatoes. I am not talking about the occasional crack that sometimes happens early on the fruit is green and then heals to forms a dry scar over time. This is the kind of splitting that happens suddenly, just when the fruits become ready to pick. Is this a common problem? Does anyone have a solution? What might I be doing wrong?