Seed Site: A Vertical Oasis of Sustainable Urban Architecture

In the heart of Hong Kong, where urban density challenges access to green spaces and ecological awareness, a new architectural vision emerges: Seed Site. Designed by Paulina Mierzwiak, Agata Woźniak, Marta Babik, and Joanna Przebięda, this shortlisted entry of the Seed Bank competition proposes a vertical sanctuary where sustainability, biodiversity, and community engagement take root.

At its core, Seed Site embodies the principles of sustainable urban architecture, merging ecological functions with residential and educational programming. The project spans a full plant cycle—from seed storage in the subterranean seed bank to educational spaces, hydroponic farms, and residential terraces adorned with curated floral calendars.

A Cycle Rooted in Design

The base of the tower houses the seed bank—a protected archive of plant species, symbolically placed beneath an elliptical pond. The basin not only adds symbolic depth but also reflects the site's orientation and natural sunlight patterns. Above it, levels 0 through 4 offer multifunctional spaces dedicated to sustainability education, ecological workshops, seed cultivation labs, and food collection zones.

Terraces in Bloom

Rising from the ground, the structure splits into twin towers, cascading down in terraces that align with the surrounding stepped cityscape. Each terrace forms part of a "flower calendar," a design strategy that uses plant blooming cycles to animate the façade with seasonal color and life. From January's greenery to August's lilies and December's arctous, the terraces not only soften the urban landscape but also enhance air quality and biodiversity.

Urban Ecology and Living

By integrating hydroponic farming and dedicated public areas, the project fosters food self-sufficiency and communal interaction. Residences on the upper floors benefit from sunlit gardens, fresh produce, and visual connection to nature—a stark contrast to traditional high-rise living. This balance between ecological purpose and urban function defines Seed Site as a prototype for sustainable urban architecture.

Form Follows Sunlight

The form of the building is driven by solar orientation and contextual topography. The elliptical cut in the structure creates open atriums that allow sunlight to filter into every level, reinforcing passive design strategies and reducing energy demands. Green terraces double as insulation, contributing to thermal comfort throughout the year.

Seed Site isn’t just a building; it’s a living system—an architectural response to the urgent need for regenerative urbanism. By embedding sustainability into form, function, and flora, this vertical ecosystem offers a compelling model for cities of the future.