Nanotechnology in a simple definition means nano-sized technology. Nanotechnology applications and potentials make new hopes for environment protection. In recent years mass production and buildup of plant residues especially medicinal plant residues is a serious environmental issue, therefore reuse and recycling of these wastes to the value added products become a major scientific and technical challenge. This study was aimed to investigate the application of two medicinal plant residues in production of some nano zinc compounds as sources of zinc in a nutrient solution culture. In a preliminary work, the residues extract of different medicinal plants as chicory, marshmallow, thyme and moshgak were examined in production of nono zinc compounds as a green and environmental friendly method. Among the tested residues, thyme ( Timus vulgaris ) and moshgak ( Ducrosia anethifolia) residues showed the best results in nano zinc oxide and nano zinc sulfide production, respectively. Therefore, in this experiment the extracts of these two plants were used for production of nano zinc oxide and nano zinc sulfide. The produced nono-zinc compounds were then characterized using scanning electron microscopy (SEM), UV-VIS and FTIR spectroscopy and X-ray diffraction (XRD) techniques. The applied techniques confirmed the successful production of nano zinc oxide and nano zinc sulfide using the extracts of thyme and moshgak residues, respectively. In a nutrient solution culture, the nano zinc compounds were then examined as sources of zinc in comparison with laboratory grade zinc sulfate and zinc acetate. For this purpose four zinc sources as zinc sulfate, zinc acetate, nano zinc oxide and nano zinc sulfide; three zinc levels as 0.2, 1 and 2 mM in modified Jhonson nutrient solution were examined to grow tomato hydroponicaly, in a research greenhous at Isfahan University of Technoloy. The test was carried out with three replications in a factorial experiment with a complete randomized design. The results indicated that the shoot diameter, greenness index, photosynthesis, leaf numbers, flower numbers, plant height, shoot fresh and dry weight, root fresh and dry weight, root volume and shoot Zn content were significantly affected by the zinc sources. Also plant height, shoot fresh weight, root dry weight and shoot Zn concentration were significantly affected by the solution Zn levels. The interaction between different Zn levels and sources on shoot dry weight was significant. The mean comparisons indicated that the highest values of all measured factors except stem diameter were related to the nano zinc sulfide source. The maximum stem diameter was observed in nano zinc oxide and the minimum was related to zinc sulfate treatment. The lowest photosynthesis rate, leaf numbers, plant height and root volume were also in zinc sulfate treatment. The highest and lowest shoot and root dry weight were related to nano zinc sulfide and zinc sulfate, respectively. With increasing Zn concentration of nutrient solution the shoot and root fresh and dry weight were increased. The maximum and minimum greenness indexes were observed in 2 and 0.2 mM zinc concentrations, respectively. Shoot zinc content was increased significantly with the Zn levels of nutrient solution. Overally the nano zinc compounds showed better results in tomato growth parameters as compared with the zinc sulfate source, althogh the superiority for nano zinc oxide was not significant. In conclusion the manufactured nano zinc sulfide with the green method increased all measured plant factors and it could be a suitable zinc source in nutrient solution for tomato needs Keywords : Nanoparticles, Green chemistry, Herbal extract, Waste, Thyme, Moshgak