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Old August 9, 2016   #13
zipcode
Tomatovillian™
 
Join Date: Jun 2010
Location: Romania/Germany , z 4-6
Posts: 1,582
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Water twice a day during the summer. Doing that this year I only have one tomato with BER, and only a little bit at the bottom. Also other stresses like high heat and sun will sometime lead to ber on its own. I have never personally seen ber in cold weather. It happens at the beginning of the season because plant and fruit development is at its fastest and that is when localized calcium deficiency will happen.
See what the most effected varieties are and skip those next year. Also, as I have said before: boron.
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