This is a component of organic farming because water and energy consumption are sustainable since no external inputs are used to fertilize the plants.
The best plants for aquaponics are greens that are low in nitrogen-requiring characteristics, including leafy greens or small salad-type vegetables like baby spinach or lettuce. Plants like cucumbers or tomatoes can do well in an aquaponic system but will require more space than greens due to their increased needs for nitrogen input.