Part of that is due to the far-above average rainfall this summer, with more this month than any other this month year (though less than in 2021, in contrast to a drought last year)
The only fertilizer is use is granular 10-10-10. But I recently dissolved some potassium capsules I had left over and added them to a gallon of old vitamins I also had left over, and put some in a 5 gal pail and for plants.
Now for the competition: My Guatemalan brother in Christ plants 4th of July tomatoes (grown from seed) in a cut away in the cement of his parking lot of his apt building in this densely pop. city, and filled it will garden souls from HD, and prunes branches off. Result:
On the other side of the fence in his neighbors yard are plants I grew (with permission) from harvest seed in plain old soil, which I have done little pruning on:
Meanwhile, back to my home plot, the first ripe toms have shown themselves, praise God:
But what is this mystery flower I planted:
My guess on the ‘Mystery Plant’ is some sort of Coneflower, Daisy or Black-Eyed Susan?
Note that your brother pruned the unnecessary growth which improved tomato yield. (See John 15:-4!)
Next year consider buying your seeds of hybrid varieties with disease resistance, provide more space between the plants, and remove the lower branches and any suckers. Fewer tomato plants will require less fertilizer.