This section is from the book "Commercial Gardening Vol4", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
There are many varieties of the Common European Myrtle, differing chiefly in the length and width of the leaves, but all are beautiful evergreen shrubs with masses of white blossoms and long stamens during the summer months, often followed by dark-purple edible berries. They are only hardy in the very mildest parts of the kingdom. The narrow-leaved form is grown as a pot plant under glass, and in the form of miniature mop-headed standards sell readily. All kinds are readily increased by cuttings inserted in water or moist gritty soil during the summer months. A compost of sandy loam and peat is best. M. Ugni, from Chili, is a fine shrub with large red or black berries, but too tender for the open air.