Rhubarb
Plant and harvest lightly for a few years. Warning: the leaves of this plant are toxic in large quantities. This plant is also difficult with regard to water and temperature. You will need to divide at the end of the season to maintain high growth rates. Check out some simple tips for growing rhubarb in The Old Farmer’s Almanac.
Strawberries
Strawberries, like raspberries, can produce a lot of fruit for a long time. You may not get too much fruit in the first season, but the plants will eventually give you enough fruit to fill your belly (and your jars of jam!). You can also assemble the plants to create more as needed. Get tips on growing strawberries from Sunset.
Pineapple
Pineapple is the sweet fruit that keeps on giving. While starting a pineapple plant can take a season or two, once you have a few, you can continue to grow pineapples as you wish. Make sure to keep the soil barely moist and plant them out of the sun. Learn some other tips from Gracious Gardening.
Artichokes
If you are planting Jerusalem artichokes, be prepared. This plant will not only grow back every year; it can be downright invasive. You will want to choose where you plant this vegetable carefully. Learn more about artichoke cultivation in Mother Earth News.