An experiment was carried out at ICA's "La Selva" Experiment Station, located 2100 meters above sea level at Rionegro, Antioquia, Colombia. The objective was to determine NCP under field conditions, by planting 28 rows, at 1 meter between rows, of the potato leaf cultivar 'Alcobaca' between 2 rows of the normal leaf type cv. 'Licato'. Seed was obtained in each row of the potato leaf material, and seedling plants were classified either as potato leaf (selfed seed) or as normal leaf (hybrid seed). Thirty plants out of 50,400 resulted from NCP; yielding an overall average of 0.064% NCP. Cross pollination occurred up to 17 meters from the pollinator, with a maximum value of 0.6% at 3 meters from the male parent.