Semillas de tomate para desayuno de Kellogg's

Let me start by saying I’m an experienced tomato grower. I had great success with germination (>80%), however I’ve had mixed results with tomato production. About half of the plants are showing signs of disease (stunted, dropping leaves, etc), but are producing a fair amount of healthy fruit. The other half of the plants are very healthy looking plants, nearly 10 feet tall, with no signs of disease, however every tomato has blossom end rot. I’ve been growing tomatoes for years and I’ve had a harder time with these than even the most finicky varieties that I’ve grown in years past. I used an appropriate amount of dolomite and epsom salt, have fertilized with the same fertilizer I use on my other varieties, verified soil ph, and have been treating the plants that have blossom end rot with Cal-Mag with no improvement. Cal-Mag usually cures BER on any other varieties that have had this issue in past years. All plants are growing in the same conditions, so basically no rhyme or reason to the results so far. Meanwhile all of my other varieties growing in the same conditions are healthy and having a great crop so far. I’m curious if it may be the humidity here in Georgia that may be causing issues with this variety. I could probably pull soil samples from each root area, get a nutrient analysis, and make micro adjustments to nutrients but honestly it’s not worth the effort when my other varieties do what they’re supposed to do without all of the extra work. Either way I will not be growing these again.