Peggy Bradley, an American researcher, was developing soil-less techniques aimed at offering low-cost, ecologically sustainable, and low-tech gardening solutions for poor, rural communities in regions such as Brazil.
Observing the efforts of the Institute for Simplified Hydroponics in Tehuacán, Mexico, Alternatives representatives also took interest in similar initiatives in Morocco and India.
Jane Rabinowicz of Santropol Roulant and Ishmael Hautecoeur of Alternatives collaborated to create what became known as the Rooftop Garden Project.
It has established community gardens in various locations, including social housing complexes, schools, seniors' residences, and urban spaces such as rooftops, balconies, and stairwells.
The Project also undertakes educational initiatives to raise awareness about the sustainability and affordability of autonomous food production.
These programs are offered in schools and universities, encouraging local communities and organizations to engage in food growing practices.
The containers are watered by rain or simple irrigation systems, keeping the roots moist while allowing for periodic airing to prevent crop damage.
This new approach eliminated the chemical components of the original system in favor of a self-watering design that uses compost for nutrients and soil for irrigation.
The majority of the Rooftop Garden Project's funding is provided by Alternatives, with additional support from institutions such as McGill University, UQAM, TelUQ, and Engineers Without Borders.