The rarest berry in the world is the miracle fruit from West Africa. Other strong picks for the rare berries list are white pineberries, finger limes, and the white wild strawberry. Boysenberries fall on this list too, with a story of near loss in the 1930s.
I built a small list of these gems over years of trips and home grow trials. A berry gets rare when its range is small. Or when shelf life is short. Or when no big farm grows it for sale. Some plants are just hard to make new from cuttings. Your odds of finding them in a store stay low.
The miracle fruit grows wild only in West Africa. Its plant name is Synsepalum dulcificum. The small red berry makes sour foods taste sweet for an hour. The plant needs hot wet air all year. It will not grow in most of the world. So fresh fruit stays rare.
Unusual berry varieties also pop up in odd spots. White pineberries came from Chile. They look like a pale strawberry with red seeds and taste like pineapple. Finger lime caviar grows wild in Australia. Each fruit holds tiny pearls of citrus juice inside.
Why do berries get rare in the first place? A few plants need just one type of bee to bloom. Others need a narrow temp range to set fruit. Many soft fruits die fast after harvest. Some hybrids cannot make good seed, so each new plant must come from a cutting.
The boysenberry is a great case in point. The fruit nearly went extinct in the 1920s. Rudolph Boysen's farm failed. The plants got buried in weeds for years. Walter Knott found the few that lived in 1932 and saved the line. We owe every modern boysenberry to that one rescue.
Other exotic berries hide in pockets of the globe. The Chilean guava (ugni molinae) grows in cool wet hills. The cloudberry hides in Arctic bogs. Akebia quinata pods burst open with sweet pulp inside, mostly in Japan. Each fruit needs a niche to thrive in the wild.
Many rare fruit cultivars die out from low demand. Big farms pick crops that ship well and last on the shelf. Soft fruits get pushed aside. A few small growers keep these gems alive in their fields and home plots.
You can hunt down rare berries at heirloom plant sales. One Green World and Raintree Nursery ship a great range of plants. Try farmers markets in the Pacific Northwest or Northern California for fresh stock. You can also tip layer your own plants to share with friends and keep these lines alive for the next batch of growers.
Read the full article: Boysenberry Plant Growing Guide
