Supposedly, determinate tomatoes like this Siberian variety “grow to a fixed mature size and ripen all their fruit in a short period (usually about two weeks). Once this first flush of fruit has ripened, the plant will begin to diminish in vigor and will set little to no new fruit.” They are also bushy compared to Indeterminate tomato varieties.
Back in May, my plant was attacked by white flies and after treating it, it lost some of its lush green chlorophyll. I thought it would die after 7/5, but I added some fertilizer and look at it now. It’s revived and new flowers are growing.
Lesson learned: I just discovered that after a pest treatment, feed tomato plant with weekly doses of fertilizer until lush green and flowers begin to emerge again.