Weak Plants and Re-Planting

[TomatoDon]

Probably, we've all done this but I was curious if there is a right or wrong way.

I have a lot of tomato plants in the ground and some look weak and yellowish, and just plain sickly. It's only an occasional one, here and there, and they are not diseased; I think they had too much heat and not enough water the first few days after I planted them.

I don't want to wait longer to see what they will do, so I wanted to ask here, is it best to just pull those weak plants and plant a new one in its place, or leave the weak plant and plant a new seeding of the same variety beside it?

I've done it both ways, and one of my most memorable plants was a large one in a gallon pot that snapped in half as I was planting it. I left the rooted part and a foot of stalk in the ground, and took the top foot of it and stuck it in the ground and watered it good, it lived and sprouted roots, and both produced a bumper crop of tomatoes.

So, should I give the yellowish weakings more time, but plant another seedling a few inches from it? Or, pull the weak plant and start over with one new seedling?

Thanks in advance,
Don