This study investigates the influence of various plant extracts on the synthesis of silver nanoparticles (AgNPs). Six different plant sources were selected for the experiment: Maclura fruit, spruce and ginkgo needles, green algae (Chlorella kessleri), and mushrooms (Collybia nuda and Macrolepiota procera). The extracts were prepared and used as reducing agents in the synthesis process. The composition of the extracts and the resulting colloids was analyzed using FTIR spectroscopy. The results showed that the composition of the extracts affected both the rate of AgNP synthesis and the shape of the nanoparticles. TEM analysis confirmed the synthesis of mainly spherical nanoparticles (size range: 10–25 nm), but also triangular prisms and polyhedral nanoparticles were observed. EDS analysis was used to determine the composition of the nanoparticles. The study demonstrated that by selecting the appropriate plant extract and using suitable extraction and treatment techniques, it is possible to prepare nanoparticles of different shapes. The findings highlight the potential of plant extracts as green and sustainable alternatives for AgNP synthesis, offering advantages over traditional chemical methods in terms of cost, environmental impact, and the ability to produce nanoparticles with diverse shapes.This study investigates the influence of various plant extracts on the synthesis of silver nanoparticles (AgNPs). Six different plant sources were selected for the experiment: Maclura fruit, spruce and ginkgo needles, green algae (Chlorella kessleri), and mushrooms (Collybia nuda and Macrolepiota procera). The extracts were prepared and used as reducing agents in the synthesis process. The composition of the extracts and the resulting colloids was analyzed using FTIR spectroscopy. The results showed that the composition of the extracts affected both the rate of AgNP synthesis and the shape of the nanoparticles. TEM analysis confirmed the synthesis of mainly spherical nanoparticles (size range: 10–25 nm), but also triangular prisms and polyhedral nanoparticles were observed. EDS analysis was used to determine the composition of the nanoparticles. The study demonstrated that by selecting the appropriate plant extract and using suitable extraction and treatment techniques, it is possible to prepare nanoparticles of different shapes. The findings highlight the potential of plant extracts as green and sustainable alternatives for AgNP synthesis, offering advantages over traditional chemical methods in terms of cost, environmental impact, and the ability to produce nanoparticles with diverse shapes.