This study investigates the impact of plant extract phytochemicals on the synthesis of silver nanoparticles (AgNPs). Six plant sources were used: Maclura fruit, spruce needles, ginkgo leaves, green algae (Chlorella kessleri), and two mushrooms (Collybia nuda and Macrolepiota procera). The extracts were analyzed using FTIR and TEM to determine their composition and the resulting nanoparticle morphology. The results showed that the composition of the extracts significantly influenced the synthesis rate, shape, and size of the AgNPs. TEM analysis confirmed the synthesis of mainly spherical nanoparticles (10–25 nm), but also triangular prisms and polyhedral nanoparticles, particularly when extracts contained flavonoids, terpenes, and phenols. EDS analysis confirmed the presence of silver in all samples. FTIR analysis identified functional groups such as hydroxyl, amine, and carbonyl groups, which are likely responsible for the reduction and stabilization of AgNPs. The study highlights the potential of plant extracts in green synthesis, offering a sustainable and eco-friendly method for nanoparticle production. The findings suggest that by selecting appropriate plant extracts and optimizing synthesis conditions, it is possible to produce nanoparticles of various shapes and sizes. This research contributes to the understanding of the role of phytochemicals in nanoparticle synthesis and their potential applications in various fields.This study investigates the impact of plant extract phytochemicals on the synthesis of silver nanoparticles (AgNPs). Six plant sources were used: Maclura fruit, spruce needles, ginkgo leaves, green algae (Chlorella kessleri), and two mushrooms (Collybia nuda and Macrolepiota procera). The extracts were analyzed using FTIR and TEM to determine their composition and the resulting nanoparticle morphology. The results showed that the composition of the extracts significantly influenced the synthesis rate, shape, and size of the AgNPs. TEM analysis confirmed the synthesis of mainly spherical nanoparticles (10–25 nm), but also triangular prisms and polyhedral nanoparticles, particularly when extracts contained flavonoids, terpenes, and phenols. EDS analysis confirmed the presence of silver in all samples. FTIR analysis identified functional groups such as hydroxyl, amine, and carbonyl groups, which are likely responsible for the reduction and stabilization of AgNPs. The study highlights the potential of plant extracts in green synthesis, offering a sustainable and eco-friendly method for nanoparticle production. The findings suggest that by selecting appropriate plant extracts and optimizing synthesis conditions, it is possible to produce nanoparticles of various shapes and sizes. This research contributes to the understanding of the role of phytochemicals in nanoparticle synthesis and their potential applications in various fields.