looks like either heat or water stress.

thisisyou,

Heat has be in the mid eighties, zone 9 NOLA. The plant gets shade in the after noon. Is water stress to much watering or not enough? I fill the reservoir in the container bottom everyday. Should I go longer between fill ups? I am flushing from the top of the container for a few days(everyday other day)and giving it very dilute feedings and micro-nutrients to see what happens. Thanks for the
help. Another pic.

lehua13 given your description I think we can rule out heat stress. As far as water stress goes a plant can be stressed by either to much or too little water. The soil should be slightly damp but not soaking wet.

Here are a couple of things that may help.....

You have leaf miners. If there are not to many of them then just pluck off the affected leaves. The ones with squiggly lines. Put them in a zip lock bag and dispose of them. Another alternative is pesticides. If you prefer organic you can try 1 table spoon of Neem Oil per Gallon of water. Add a few drops of soap to the mixture for a wetting agent. Spray the whole plant along with the tops and bottoms of the leaves. Repeat every 4-6 days as needed. The time to spray would be in the late afternoon. If you do not have a preference for organic pesticides there are better none organic alternatives.

If the container is not protected from the sun in some way it should be. Think about how hot a bottle of water gets sitting in the sun. Way to hot for plants, right? If the reservoir does not have a hole in the side to let excess water out then the proper thing to do its to drill one.

Stop flushing. Its stressful to the plant. Its something thats done as a last resort to compensate for a massive over fertilization. Its meant to get something out of the soil. Not to put fertilizers in it.

Remove any dead leaves. They are a perfect place for molds and fungus to start growing and thats a bad thing.

lehua13,

Without any further information, I'd guess that you may be overwatering your plants.

Do you feel the growing medium 3-4 inches under the surface before you water? If you poke a finger down that far, is the growing medium wet, moist, or dry? If it is wet, wait until it is damp bordering on dry to water. If it is dry, water.

If you prefer not to poke a finger into the growing medium, GardenWebber sprouts_honor (Jennifer from Cleveland) had a wonderful suggestion on how to tell whether or not you need to water your tomatoes, and I quote here: "Get a wooden dowel rod (or two) and sink it in the ground near a plant or two and leave it. Pull it out when you think you need to water. If the top is dry and the bottom is a little damp, it's time to water. If it looks dark and feels saturated, wait to water. I use this technique with potted plants that don't like being over watered and it's helpful with in ground plants too."

I hope that helps.

Betsy

Thanks betsy,

I will check what you suggest. My watering is coming from the bottom up and the soil wick maybe allowing to much water to move into the soil bed. I also believe that allows salt to increase in the soil as well. The plant is getting large and I am sure the roots are getting dense at the bottom of the soil bed. I am going to start watering from the top down and checking as you suggest. Thanks for your help. aloha

Sorry to be the bearer of possibly bad news, but that bright yellow color is often associated with fusarium wilt, a soil borne fungus. Even resistant varieties can become infected if the soil also has rootknot nematodes.

Cut off an affected branch, slice it crossways, and see if there is a ring of brown inside. Another way to diagnose fusarium. The ultimate test -- see if the plant gets yellower and yellower and wilts. When I gardened in the deep south, I could not grow heirlooms because of this widespread disease.

Fusarium wilt yellowing often appears on one side of the leaf or branch. Not fusarium IMO. Probably over watering with the flushing.