The study on potato (Solanum tuberosum L.) took place during the cropping season of 2019–2020 at the Babil Governorate, Abu Gharq Region, Iraq. This study aimed to determine the response of five potato cultivars, Burren (control), Everest, Arizona, Argos, and Evora, to foliar application of Loenergy Plus Nano-nutrient solution with three concentrations (0, 1.5, and 2.5 m^l-1) and three replicates. The results showed the Loenergy Plus Nano-nutrient solution’s spraying significantly affected the potato cultivars’ vegetative and yield characteristics, especially when used at a concentration of 2.5 ml L^-1. It resulted in the highest average values compared with the lower concentration and the control (distilled water). The potato Argos cultivar expressed the maximum values in vegetative traits among the studied potatoes. The research showed the different potato cultivars behaved differently to the same factor in the Iraqi environmental conditions.

Keywords: Potato (S. tuberosum L.), solanaceae, nano-materials, foliar application, tuber

Key findings: Foliar spraying of Loenergy Plus Nano-nutrient solution (2.5 ml L^-1) resulted in increased potato (S. tuberosum L.) growth and yield regardless of the cultivar type. Some potato cultivars showed suitability to grow in Iraqi environmental conditions much better than the Burren cultivar as the most commonly cultivated variety in local farms.