Small evergreen citrus tree with yellow fruit.
Lemon is a citrus cultivar, thought to be a hybrid of sour orange and citron. It is usually referred to as species Citrus x limon.
Lemons are one of the most popular citrus fruit and have both culinary and non-culinary applications. The juice has a high level (typically 5-6%) citric acid, which gives it a notable sour taste, but also contains a range of other vitamins and minerals.
There are a number of common lemon varieties in cultivation today. These include year-round fruiting, frost tolerance, variegated leaves, thick skinned varieties.
It is/has been used as an antiseptic, for aromatherapy (although alleged aroma effects on the immune system have been dis-proven), a source of citric acid, wood polish, as a deodorizer, as a source of d-limonene insecticide, and as a 'safe' acid for science education.
Use this tag for all questions about growing lemon trees. Use the citrus tag for questions about citrus trees in general.