Cranberry

A floating harvest

Cranberries grow in bogs — low-lying acidic wetlands. Modern cranberry harvesting is famously visual: bogs are flooded in fall, mechanical “beaters” knock the berries loose from underwater plants, and the floating berries (each contains tiny air pockets) are corralled with floating booms. The result is the iconic flooded red berry pool image, used in advertising for decades.

The technique was developed in the 1960s; before, cranberries were dry-harvested by hand.

Pectin and sauce

Cranberries are unusually high in pectin — the natural gelling agent. Combined with their acidity, this means cranberry sauce sets firmly with just sugar and water, no added thickener. The classic American Thanksgiving recipe (cranberries + water + sugar, simmered 10 minutes) sets into a firm, sliceable mass — distinctively American holiday food.

UTI lore

Cranberry juice has been promoted for decades as a urinary tract infection preventive. The biochemistry is real: cranberries contain proanthocyanidins that prevent E. coli bacteria from attaching to the bladder wall.

But the clinical evidence is mixed. Recent meta-analyses suggest cranberry juice has modest protective effect against UTIs — particularly recurrent UTIs in some women, but the effect is small and inconsistent. The juice doesn’t treat established infections; antibiotics do that.

Almost a New England-only crop

About 95% of U.S. cranberries come from just five states: Wisconsin, Massachusetts, New Jersey, Oregon, and Washington. Wisconsin alone produces over 60% of the U.S. crop. Outside North America, Canada (mostly British Columbia and Quebec) is the second-largest producer.

Cranberries are one of just three commercially-grown fruits native to North America — the others being blueberry and Concord grape.

Dried Craisins

The dried-cranberry product Craisins (Ocean Spray brand, since 1989) is the dominant form of dried cranberry. Most Craisins are infused with apple juice during drying to mellow the intense tartness; pure dried cranberries without sugar would be too sour for most palates.