QUESTION: Should you cut the bottom leaves off tomato plants?
ANSWER: Once your tomato plants have reached 12 to 18 inches tall, you may notice that some of the leaves are dying or turning yellow. It’s fine to remove those leaves as long as they are below the first set of flowers on your tomato plant.
You can also remove the “suckers” that grow from where the branches of the plant meet the main stem. With determinate tomato varieties, only remove discolored or dead leaves and suckers below this first set of flowers. Indeterminate tomato plants can take heavier pruning that extends higher up the plant.