This small tree has a short trunk with many thorny branches that form a bushy rounded habit. It has light green leathery ovate leaves and the fragrant white cup-shaped flowers appear in a cluster from spring to summer followed by yellow eatable fruit.

Hardiness zones 9 to 11

Citrus limon (Lemon) is naturally found in south-east Asia growing in scrubland and in woodland thickets. It prefers a well drained sandy loam that is slightly acid to alkaline with a low salt content and dislikes poorly drained clay based soils. It grows in an open sunny position and is frost, wind and drought tender.

Lemon trees are grown for there fruit and upright habit. It is planted in small gardens as an ornamental producing fruit or grown in tubs or planter boxes as a specimen. It is suitable for coastal or inland regions establishing in 3 to 5 years and is moderately long lived. There are several varieties available and in cold climates they are grown in conservatories or glasshouses. It is moderately deer resistant. ID 688

Note:
It is also grown commercially for its fruit and lemons bare overlapping crops with fruit available throughout the year.  

Citrus (SIT-rus) limon (LEE-mon)

“Citrus”, from the Latin name for the citron, citron medica, prized for its fruit since biblical times; “limon”, from the Arabic name for this fruit.

Rutaceae (roo-TAY-see-ee)
Rue and Citrus Family