My tomato leaves on one plant are shriveled, but not on surrounding plants

Question

All are planted in a raised garden box with a mixture of topsoil and potting soil. I have two plants that are less then 3′ away and they are doing great.

Answer 1

There are several reasons this can happen, from disease to root damage to fertilizer burn. As the plant is failing, I would recommend removing it ASAP. If it is failing due to disease, that disease could spread to nearby tomato plants if it is left in the ground.