this post was submitted on 17 Aug 2025
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Across the various sub's i've seen this question maybe 6 times in the past 2 months.
It must be tomato season.
Blossom end rot. Most common tomato disorder. Add more calcium to your soil; fastest way would be to go buy some fertilizer with calcium specifically, and if you have more time, to add some crushed limestone or shells to your soil. Bone meal is the most easily applied, fastest way to fix a calcium issue.