New tomato leaves turning yellow

Question

New tomato leaves turning yellow on transplants as well as established plants. I’ve  attached photo for assessment. Diagnosis and help would be greatly appreciated.

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Answer 1

There are lot of reasons your tomatoes may be turning yellow and diagnosis can be tricky.

It's possible your soil lacks nutrients, so you may want to have your soil tested by a lab. You can also purchase DIY soil tests at garden centers.

There's also a good possibility your plants are diseased. If so, this should help you diagnose the problem:https://www.gardeningknowhow.com/edible/vegetables/tomato/tomato-diseases.htm