For crop rotation to be effective, gardeners should not plant vegetables belonging to the same plant family in the same location for two or three years. Obviously, crop rotation in a small garden may be difficult. However, home gardeners should rotate their vegetable crops as best they can. To assist crop rotation efforts, the following list places the commonly grown vegetables in their proper botanical families. Accordingly, it would be inadvisable to plant potatoes where tomatoes were grown the previous year.
Foliar blights are common diseases of tomatoes and potatoes and can severely damage both crops.
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