Subjective

I have discovered that Melbourne has had a few other green roofs established in the last 6 years. Some of the successful, some of them not.  

One of the best known of the ‘debatables’ would be the Council House 2 (CH2) building situated on the corner of Little Collins and Swanston Street. CH2 is one of Melbourne’s environmentally friendly buildings awarded a 6 Green Star Rating. It is an inspiring building. And given the strong environmental focus of the building the green roof garden had great expectations. But many, including I, do not believe it really stood up to this.

(http://www.landfood.unimelb.edu.au/green/greenroof-08-09.html)

Basically, it lacks greenery with very basic and minimal horticulture (again, in my own opinion)

(image source http://www.melbourne.vic.gov.au/Environment/CH2/aboutch2/Pages/RoofLandscape.aspx)

I guess for a me a green roof, is just that. It is green. And lush, and inviting. Yes it is subjective, but I just feel the CH2 is in parts baron with a focus more on art and hard landscape, rather than the plants and greenery.

Another rooftop I think is rather a hit is the Origin Energy Rooftop Garden. Situated at 271 Collins Street, this Ian Baker design encompasses many sustainable principles and delivers this in with a functionality component. It is decked out with seating areas, a bbq area and plenty of greenery. It is inviting. With features like like this, I think they are on a winner;  

• 10-metre diameter area of timber decking surrounded with bench seating
• Lattice screens that create a wall of greenery
• Breakout areas in the form of sunken and stepped decks;
• A barbecue and entertaining area with two 3,000 litre rainwater tanks for efficient plant watering; allergy-free native and drought tolerant plants

(image source http://melbourneopenhouse.org/cms-buildings/origin-energy-roof-garden.phps)