The melliferous potential is a measure of the nectar importance of a species and is calculated by considering the average quantity of nectar secreted by a flower in 24 hours, its sugar concentration, the life span of the flower and the average number of flowers per unit of surface area or (in the case of trees) per plant The results are expressed in terms of kg of honey / ha, but this does not constitute a real forecast of the quantity of honey that can be obtained, but rather a theoretical estimate of the potential of the plant in the conditions more favorable.