The agriculturist Paul Schoenwald subsequently donated a plot of land to the state government to establish a green area, but the project was unsuccessful.
A committee, which included prominent teacher and religious figure Teodoro Luís, was formed to develop the project, which began in 1957 with the first planting of selected species: a collection of palm trees, conifers and succulent.
Soon after, in 1962, was inaugurated the oven for cacti, in the 1970s and the botanical garden was integrated into Fundação Zoobotânica Foundation, along with the Park Zoo and the Museum of Natural Sciences.
A project linked to the Program Pro-Guaíba allowed in the 1990s an improvement in the infrastructure of the Botanical Garden, where nurseries were built for bromeliads, orchids, succulent, vines and cacti, and reforms have taken place in the center of visitors and the administration, beyond the creation of a seed bank.
At the Museum of Natural Sciences, which is located inside the Porto Alegre Botanical Garden, there is an exhibition of fossils found in geopark of paleorrota, as well as contributing to publications on the subject.