12 Most Profitable Plants for Aquaponics, Small Gardens and Backyard Nurseries

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7. Lettuce
 Lettuce can be used in all kinds of dishes and, just like kale and spinach, doesn’t need an entire field just to grow. There’s not much to lettuce, but it can sometimes have a value of $16 per square foot, which is great for something that’s mostly water.
12 Most Profitable Plants for Aquaponics, Small Gardens and Backyard Nurseries

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