Violets are available in pinks, dark pink or red, purple, lavender, white and bicolors. Reaping a long season of blooms, however, requires some basic cultural practices. One of the main factors will be fertilization, to which violets respond quite readily. They are not extremely particular to the type of fertilizer as long as it meets their nutritional needs. However, they do respond to a regular program of fertilization.
Many gardeners get good results by using general house plant fertilizers.
Some of these come as dry powders to be mixed with water. The solution should be used at specific intervals or at each watering as recommended by the manufacturer. Be sure to read and follow specific instructions, because they may be vary significantly from one manufacturer to another. Some may be recommended at monthly or six week intervals while others are prepared for use at each watering. Foliage color can be used as a guide provided light and other factors are correct.