Black area on bottom of tomatoes

by Jim Herklotz
(Green Valley, AZ USA)

My tomato problem has shown itself on the bottom of several elongated plums. A black area appears on the bottom of the fruit but is not on all of them. The plants are within a raised garden, watered low and haven't been rained on due to our location in the desert southwest just south of Tucson.


If there is something I can do to either prevent this discoloration, besides taking all of the effected fruit off of the plant, I would greatly appreciate a solution. If it is a lack of fertilizer, which element is missing? I don't see any varmints in the garden except cactus wrens.

Jim

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