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.

We may receive a commission on purchases made from links. Twins Drew and Jonathan Scott have transformed the yards of numerous homeowners since their inaugural HGTV show, "Property Brothers ...

Among the casualties of the canker war were my grandmother's lime and sour orange trees in Miami. Citrus canker is a disease that creates small lesions on fruit and leaves. The infected fruit ...

Today, nearly every citrus grove in Florida is infected with the disease. If an orange tree were to remain untreated, the disease would block its ability to get nutrients and kill it within a few ...

I could use all the help I can get. Answer: Sounds like your grapefruit tree is lacking nitrogen. I would use a citrus fertilizer — preferably one higher in nitrogen. Always follow instructions ...

uninfected trees were destroyed in Orange County between 2002 and 2006 as part of the Florida Department of Agriculture and Consumer Services’ efforts to eradicate citrus canker, according to ...

When citrus trees are grafted onto the Flying Dragon trifoliate orange rootstock, for instance, it makes them grow smaller than they would on other types of rootstocks. This is ideal for spots ...