Herbs are commonly used throughout Bulgaria for medicinal purposes, in the preparation of food, decoratively, and as a source of income. A survey conducted from December, 1998 to March, 1999 revealed that fifteen herbs are commonly used throughout Bulgaria. These herbs are primarily popular medicinal species or are used in traditional cuisine. Even though herbs are commonly used throughout Bulgaria, there are significant regional differences in herb use. Local topography, natural diversity of herbs in proximity to a town, town population size, and traditional knowledge all affect regional use of herbs. Changing demographics and the transition to a market economy may reduce herb availability.