Watering Of Tomato Plants
OK- Was wondering that when the tomato leaves look like they are dry or maybe dying, are we giving them too much water or not enough?
Without seeing your plant, my best guess is that you are not giving the plant enough water.
The biggest percentage of the time, a tomato plants leaves will turn yellow if too much water is given.
So, barring that there's not a disease or fungus lurking in the tomato plant, I would up the watering schedule.
If your tomato plant is in a container, keep in mind that the plant has no place but the container soil from which to draw it's water. On a hot Arizona day, the soil will dry VERY quickly. Watering as much as twice a day would not be unheard of.
If your tomato plant has been put in the ground, maybe all that needs to be done is a stronger soaking of the soil around the plant. (By the way, don't water the tomato plants leaves, only water at the base of the plant.) Tomato plants won't react well when watered from above.
So, in either case, make sure the soil is soaked through. In other words, you don't want just the top layer of soil watered.
Hope this helps, and happy tomato gardening!!!