Available at Murray Family Farms, Santa Teresa lemons are the "OG limoncello," according to Harris. The Ponderosa, in ...

Growing a lemon tree indoors is an excellent way to enjoy fresh citrus year-round while adding a vibrant touch of green ...

Lemons owe their signature tang to citric acid, yet the molecular mechanisms governing its accumulation have long remained a ...

Why are lemons sour? Delve into the genetic explanations behind the tartness of lemons and their production of citric acid.

A version of this story appears in the February 2017 issue of National Geographic magazine. Citrus, in many ways, stands alone. So many cultivated species have come from so few primary ancestors.