The important European and international scientists who came to Idrija because of the mine did not only explore its geology, but also its botany. They laid the foundations of natural science in Slovenia. Knowledge of flora has a long tradition in the Idrija environment, which began with the arrival of the first botanist in Slovenia in the 16th century, P. A. Mattioli. He was followed by doctor and naturalist G. A. Scopoli, who discovered and described several previously unknown species, including the henbane bell, Scopolia carniolica, named after him. B. Hacquet worked in Idrija as the mine doctor. Two plants are named after him: Hacquetia epipactis and Pedicularis hacquetii. F. Hladnik, born in Idrija, is known as the founder of the Ljubljana Botanical Garden. Dedicating his life to researching the flora of the Carniolan region, he discovered a plant on the Trnovo Forest area that was later named Hladnikia pastinacifolia. In his memory, the left side of the Rake walking path was named Hladnik Botanical Ledge as many famous plants flower here in the spring. H. Freyer was born to a famous Idrija-based pharmacist Karl Freyer. He spent a lot of his time to studying botany in the Idrija region and was the first to describe Daphne blagayana, a flower even Frederick Augustus II of Saxony came to see.
Famous in Idrija and its vicinity is also Primula x venusta that is a hybrid between Primula auricula and Primula carniolica. In the Upper Idrijca area, there grow several species of orchids (Orchidaceae). Also special are Alpine plants such as the alpine snowbell, the flower of the sweet-lady, Rhodothamnus chamaecistus, and the Bertoloni columbine.
As a homage to the pioneering researchers of nature, Scopoli’s Memorial Garden is planted in Idrija – at the entry point to the Rake Walking Path.