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A prospective study was carried out in the region of Fes-Boulemane (in north-central Morocco) to evaluate the population’s perception of plant use in herbal medicine. A questionnaire was used to assess the population’s sociodemographic characteristics, knowledge of the toxicity risks associated with plant use, and methods of plant use. The results of this study showed that 601 respondents (75.1%) practiced herbal medicine and that 28% of this population are illiterate. Herbal medicine and traditional pharmacopoeia products were preferred by 57.2% of this population for their efficiency and low cost. A total of 14.8% of the plants used are known to be toxic, and 96.7% of this population have some knowledge of plant toxicity. Oral administration was the preferred mode of administration. Leaves were the most used part of plants in traditional herbal medicine (27.5%). Decoctions represented 39.9% of overall administration, followed by herbal teas. Doses are roughly estimated in 85.2% of cases. Of all illnesses treated, digestive disorders were most frequently mentioned.