Tomato Plants - Knowledgebase Question

Roxbury, Ma
Avatar for lcoleman5360
Question by lcoleman5360
July 21, 2009
I am having a hard time with them this year. First, the black spot, then Aphids. Now a majority of the young green tomatoes are rotting from the bottom! Do you know what causes this and what I can do? I'm afraid I won't have any go to term and mature... Thank you.


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Answer from NGA
July 21, 2009
Some years are a real challenge when it comes to growing a veggie garden! What you describe sounds like blossom end rot, a physiological condition caused by a lack of calcium at the growing tip of the fruit. While your soil may have adequate calcium, fluctuations in soil moisture content from dry to wet really increase the incidence of blossom end rot. It is especially bad on the early fruit each summer and in sandy soils. The damage occurs as cells die at the tip of the fruit. In time (and as the fruit grows) the spots enlarge and turn black. So, by the time you see it, the damage actually has already occurred some time back. Remedies include: having a soil test to make sure calcium levels are adequate, adding organic matter to a sandy soil to increase its moisture holding capacity, keeping plants evenly moist, especially during the development of the first fruits (mulch helps maintain soil moisture), and spraying plants with a Blossom End Rot spray (contains calcium) which can usually be purchased from your local garden center. If you have an annual problem with blossom end rot, treat when the fruit reaches marble size. However, usually the other cultural practices will control the problem without the need for spraying. The tomatoes are still edible. Just cut away the affected portion.

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