Their strong scents can help to repel insect pests like aphids, flies ... make sure they're several feet from the base of the ...

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.

Before planting clear the area of all grass and weeds. Add 4 to 5 shovelfuls of organic matter like peat moss or manure to ...

Q: I have a lemon tree growing in a pot on my patio ... pest infestations such as aphids or mites, or diseases like citrus greening,’ says Susan Poizner, author and creator of Orchard People.

CTV is a viral disease that affects citrus trees, causing decline, reduced fruit yield, and potential tree death, especially in those grafted onto sour orange rootstock. Symptoms include yellowing ...