This garden is not happening and remains a luxurious spot for few, because of the Wachstumszwang inherent to our market ruling monetary system. This ugly German word describes the need of growth created by credit money. Every economic decision has to defeat the Central Banks interest rate or inflation. For all those spending most on basic life items such as rent, food and transportation our system means constant poverty or financial loss.
The best translation is actually Growth Preassure, because every working human knows the constant preassure of income Vs spending. We are all in need of constant income rises facing rising prices and our desires for better items and services around in our lifes.
A rooftop garden, balcony garden or backyard garden creates no profit in terms of the monetary system. As a matter of fact are hardly any public gardens profitable in any respect and will loos against every shopping mall in every communities balance sheet. They cost money.
Our system is as incapable to satisfy demand as the Stalinist created socialism and hurts other regions that have decided for a different system than ours or just have soil we need. The towns we live in have not enough facade length to provide car parking for every tenant who desires his own car. Investments into parking are too expensive for both individuals and towns.
We could have towns in which the person with an income has no preassure leaving work when facing times of stagnation or even losses. That human could drive into another quarter of town and find within 3km a parking spot also having no time preassure of walking these 3km. That citizen would find streets with trees giving shadow and find plenty of urban furniture with many small shops offering constant priced water glasses, chilled soft drinks and other beverages facing as him no need of rising rents and other costs with clients to whom it not matters if the 3km take one minute of 30 minutes having a gardener for their balcony garden who is busy in the region like today only window cleaners in his office ghetto.
But not as long as money is "lended" ... or actually sold for money.