“American firm wHY beat off competition from 125 teams from 22 countries to design the project.
The Ross Development Trust, which was set up by Norman Springford, the founder of Apex Hotels, is responsible for the development phase of the proposed improvements as well as raising the £25m needed for the project.
The Quaich Project is a partnership between the Ross Development Trust and the City of Edinburgh Council, which operates and maintains the gardens.
David Ellis, managing director of The Quaich Project, said: “This is the latest iteration of the design work that comes from our winning design in the competition we launched in 2017.
“Since then we have been doing a lot of work with key stakeholders in the city, the council, local groups and organisations which might look to use the gardens, taking on feedback to amend the designs to reflect what they are saying.
“There are a lot of fantastic things at the moment about the gardens but there is a lot of outdated infrastructure, access is really poor, so we are making sure the gardens are compliant with 21st Century accessibility protocols and making sure everybody in the city has the ability to visit them if they wish.” ”