>> I have one of my tomato plants that is not up to snuff with the rest, and it's leaves are curling as if it didn't get enough water. It's the same cultivare as those next to it, and they all get treated the same.
I was thinking 'something underground and localized, where you can't see it".
Some burrowing critter ate half its roots.
A big paving stone has blocked all its roots.
One clump of soil amendment that rotted wrong, or carried a root disease.
Some soil condition that prevents that one spot from draining (drowned roots), or drains too well in that one spot (drier roots).
More likely, though, is some subtle disease or genetic shortcoming. Even F1 hybrids and very stable OP varieities have occasional throwbacks, reversions, flukes and sports.
I would NOT save seed from it. If it turns out to have a root disease, the sooner you spade it up and spread the rootball over the lawn or ornamental bushes, the better. Consider not composting the plant.
