Yes, these are all in containers. I am using the soluble liquid (
https://www.promixgardening.com/en/p...-fruits-3-6-12) about once very two weeks and adding granular (
https://www.promixgardening.com/en/p...rtilizer-4-4-8) once a month, more or less at the recommended rate. I note that after liquid fertilization, there doesn't seem to be any noticeable improvement in the health of the plant (the leaves).
I thought it's some kind of disease, because I had early blight on potatoes in a garden bed a few feet away, and I've had something like this almost every year in tomatoes planted in those containers or in the bed a few feet away, and because the heirlooms (Pineapple, Delicious, and Sungold) have been affected the most. I've had to pull them, actually. The others are less affected.
Salaam