Designed as an added amenity to office tenants on the east side of the mixed-use complex at 900 North, this green roof is the third roof space located at this address. Ninth-floor business tenants have access to the roof’s intimate gathering area, where they can sit surrounded by a mix of grasses, sedum and alium that are planted at varying heights. From within, tenants view the roof through a scrim of serviceberry trees underplanted with cotoneaster, boxwood and pachysandra.