CITRUS

Grown in most of the warmer countries of the world, this genus comprises around 20 species of evergreen shrubs and small trees that are greatly valued for their edible fruits and aromatic volatile oils. Highly ornamental, the citrus family crops longer than any other fruit tree, and the dark glossy fliage holds its attractive appearance throughout the year. The fragrant, white, star-shaped flowers appear singly or in clusters at different times of the year, depending on the variety. The tough skin of the fruit, dotted with many tiny cavities that are filled with oil, encloses a white "pith" of varying thickness. Within this, the characteristic juice-filled segments are contained.


CULTIVATION


In frost-free conditions most Citrus plants thrive in fertile well-drained soil in a sunny position protected from the wind. During the growing season they need plenty of water and regular applications of nitrogenous fertilizer to promote growth and fruit size. In general, Citrus plants need little pruning, except to remove shoots below the graft union and, when mature, to remove damaged or dead branches and reduce overcrowding within the tree. Propagation is by budding or grafting the desired Citrus species onto a suitable rootstock.


Top Tip


Citrus species make excellent decorative and fruiting trees for large posts. They should receive plenty of sunlight and be protected from frosts and wind.