The lemon plant forms an evergreen spreading bush or small tree, 3–6 metres (10–20 feet) high if not pruned. Its young oval leaves have a decidedly reddish tint; later they turn green. In some varieties the young branches of the lemon are angular; some have sharp thorns at the axils of the leaves.
Lemon trees are best bought in spring or early summer, giving them time to acclimatise to your conditions before the onset of autumn. Water plants freely in summer, but never allow the pot to stand in water. Water more moderately from autumn to spring, allowing the compost surface to partially dry out between watering.