My tomato plants shriveled up at the ends and stopped growing. They are planted at the edge of my lawn and my neighbor's yard. I had to put in all new plants. The new ones seem to be fine. Could this because I planted them too soon (beginning of May when we had excessive winds and a lot of rain or are they picking up weed killer that may have been put down in my neighbor's yard)?
The early planting could have affected the growing tips if it got too cold, but should otherwise not be a problem. Make sure they are in well-draining soil and give them a boost of balanced fertilizer. I would pinch out the dead ends. Should the plants be suffering from overspray, this article will help: https://www.gardeningknowhow.com/plant-problems/environmental/herbicide-plant-damage.htm