Do not over-water tomatoes, especially in clay and heavy soils. A good mulch around the plant helps reduce water loss due to evaporation and keeps the moisture level a bit more consistent around the roots. Water deeply and infrequently. Another cultural practice that helps reduce the likelihood of BRE is avoiding over-fertilization, he adds. Most tomatoes should only be fertilized at the time of planting.
Excessive fertilizer builds up in the soil and adds to the salt content.
Roots can be damaged while weeding with a hoe or cultivating too deeply around the plants. Simply pull out those nasty weeds growing next to the plant. A good mulch not only will reduce water loss, but it also reduces weed growth. The other vegetables susceptible to BER, peppers, melons, squash and even eggplants, can be helped by the same methods that are effective on tomatoes. Of course, in the case of eggplants, nobody really cares.