Can large trees in dreamy condo sky take root on balconies?

Arborists and simple tree lovers alike may wonder how the lush trees shown sprouting out of every balcony of a proposed complex on Davenport Rd (at Bedford Rd) will grow adequate root systems. Plans for the curious development proposed for 306 through 326 Davenport Rd are described at Urban Toronto. It is said that in order to properly install, maintain and preserve the trees, they’d be chosen from a specific list of species that are capable of surviving in such a setting. They’d then be kept in planters that are both waterproof and thermally insulated.