How to Grow Violet
Viola odorata, the sweet violet, is a hardy perennial, parent of the florist’s violets, many of them sweetly scented. The soil should be rich and moist but well-drained. Plant the crowns in the open in a sheltered, shady position in April, or in September for winter flowering in a cold sunny frame. Propagation is by runners removed in April. Other runners that are produced during the summer months should be removed and discarded.
Named varieties include: `Couer d’Alsace’, pink; ‘Czar’, blue; ‘De Parme’, pale lavender, double; ‘Governor Herrick’, deep blue; ‘Marie Louise’, mauve, double, good for frame cultivation; ‘La France’, violet-blue; ‘Princess of Wales’, large violet-blue; `Sulphurea’, creamy-yellow; ‘White Czar’, single white.