Why would tomatoes and lettuce do poorly in a vegetable garden in a city while peas and beans do well?

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Photo by Melissa Robertson

Question by Harry: Why would tomatoes and lettuce do poorly in a vegetable garden in a city while peas and beans do well?
A vegetable garden is planted in a vacant lot in a city. Peas and beans do well, but tomatoes and lettuce do poorly. What is the likely problem? How could it be corrected?

What do you think? Answer below!