If you've ever tried to grow tomatoes on a balcony in Calgary, you might already know the answer to this question. It's dry, windy and cold! What doesn't dry up blows away. Anything on the building envelope is especially exposed. We face these same challenges when establishing green roofs. The manicured green roofs of Toronto and Vancouver with beautiful big trees, vines and exotic flowers unfortunately just aren't made to survive in Alberta. That's not to say it can't be don