The project, dubbed the 'buried Easter egg', is intended to provide disadvantaged people with employment opportunities through the teaching of gardening skills.
According to the practice, if built the school would be a sleek spindle-shaped translucent structure which appears to be sunk into the ground.
It is hoped that this would enable it to integrate itself sympathetically with the natural surroundings of the park.
The park is hoping to raise funds to develop the buildings, which would provide 5,000m 2of teaching areas, a reception and exhibition area.
The architect has teamed up with Wandsworth Borough Council and horticultural therapy charity Thrive to develop the project.