ATTN PLANT GENIUSES: On the right is our cherry tom, it's thriving. On the left is our heirloom Paul Robeson tom. It's ill. (Symptoms: curled leaves, no flowers, shrinking). Internet says: Too much water, or too little water, or bugs, or not enough nutrients. NONE OF THIS IS TRUE

1) Experimented with drought and limiting water - no help. 2) Experimented with more water (and storms) - no help. 3) no infestation. 4) soil is nutrient-rich. The tomato NEXT TO IT is six feet tall and thriving. And we have another Paul Robeson in the garden plot - thriving. WHY

Basically am I allowed to throw this plant away and start from scratch - or is it too late for that? Or is there a way to save it????