Tim, you are right overfertilizing does contribute to BER. (see below)
But I was curious , do you add the 2 cups of dolomite as instructed by the Earthbox people per box if growing tomatoes?.
causes of BER
"The following conditions may increase BER: low soil Ca, high N rates, using ammoniacal sources of N, high concentrations of soluble K and Mg in the soil, high salinity, low humidity, inadequate soil moisture, excess soil moisture, damage to root system by nematodes, disease, mechanical means or heavy pruning. " (U of FL BER brochure)
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"When we kill off the natural enemies of a pest we inherit their work."
Carl Huffaker
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