Blossom end rot can be a problem not only in tomatoes, but also in peppers, zucchini, and cucumbers. For those of us who already have harvested or have these veggies on the vine, the problem may be a timely one. Remember that blossom end rot can occur at various stages of growth. If you’ve never seen this problem, the blossom end of the fruit develops a dark-colored, watery spot on the end. This end enlarges while the skin sometimes becomes brown and leathery. The soil may contain enough calcium according to soil tests, but calcium moves very slowly into and through the plants so actually this problem may be a symptom of calcium deficiency. Rapidly growing foliage may also contribute to the problem as the calcium can’t move into the tissue fast enough.
To help control blossom end rot, spray the plants with a blossom end rot spray after the fruit has started to form. This spraying is especially beneficial if you have conditions that favor rapid growth such as a dry period followed by a soaking rain or after an application of nitrogen fertilizer. Maintaining even moisture with mulch or watering can also help reduce blossom end rot.
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