Tomato Plants
Q.

What would cause vine tomatoes to burn on bottom?

Zone 83854 | Anonymous added on August 10, 2019 | Answered

1st year growing garden in raised pine boxes. Tomatoes at 3-4" diameter, show large discoloration. See photo.

A.
A.Answers to this queston: Add Answer
GKH_Susan
Certified GKH Gardening Expert
Answered on August 11, 2019

This is blossom end rot. This is caused by a lack of calcium, and often magnesium. The solution to correct this is absolutely simple, but can be caused by environmental factors as well.
Dolomitic lime works well. It will provide calcium, magnesium, as well as keep the soil pH balanced. This, alone, will stop the rot completely most of the time.

This article will help: https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-blossom-rot.htm

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