The Everlasting Garden: 10 Fruits and Vegetables You Can Plant Once and Enjoy Forever!
Also known as red chicory, radicchio is an increasingly common ingredient in salads and gardens around the world. Radicchio grows best in cool seasons like spring and fall, and well established plants can resist some frost. Be sure to plant red chicory where it will receive full sun during cooler weather for best results, and shade if possible during warm summer days.
If you desire a fall crop, you can tuck the plant into the soil around mid-to-late summer.
7. Onion and Garlic
Hardy even through cold winters, garlic and onions are an easy perennial to grow. Simply plant cloves in the fall and watch for the green shoots to burst upward in the spring. By leaving a few of these shoots alone each year, they will flower and seed themselves and ensure a crop for the next year.
Citrus trees tend to grow best in tropical and subtropical areas. While most sweet citruses require warmer climates, lemons do not and can be grown even in cooler and coastal areas. For best results, plant lemon trees in the spring.
That will allow the tree a full growing season to become established before colder weather has a chance to potentially affect the tree’s development. Lemon trees need lots of sun exposure and well-draining soil to flourish. It’s advisable to fertilize the tree every month through spring and summer of the first year of growth with a nitrogen-rich citrus tree fertilizer.
Avocado trees typically grow in humid tropical areas. You can grow them in moderately warm climates, however, with temperatures ranging from 60-85 degrees Fahrenheit and moderate humidity. Once strong and established, an avocado tree can survive temperatures as low as 28-32 degrees Fahrenheit without suffering much damage.
If grown from seed, it may take from 5-13 years before an avocado tree will produce fruits, while planting a tree will shorten your initial harvest to about 3-4 years. Once a tree produces fruits, it will give you a steady crop for many years. In fact, the original Hass avocado tree is now nearly 90 years old and still producing, while some wild trees in Mexico are more than 400 years old.
10. Sweet Potatoes
With warm and moist soil, sweet potatoes are so easily grown you can literally drop a plant on the ground and it will take off. For best results, rows of sweet potatoes should be spaced 3 feet from each other, with about 12-18 inch spacing between plants. That will maintain adequate space for vine growth.
For a guide of growing zones, visit the following link: https://planthardiness.ars.usda.gov/PHZMWeb/