Answer: Tomato and peppers will tolerate soils down to pH about 6.0. If you're soils are too acid for them, you should see nutirent deficiency signs suc has yellowing leaves, stunted growth... Have a pH test done to determine your soil's acidity. The cracking of the fruits is more likely due to moisture fluctuation. Mulching is a good idea and shouldn't contribute to the soil's acidity. Keep the plants evenly watered this year and the soil fertile. Hopefully they'll grow better.
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