It is good to see that Russ Cheatham, one of the original Green Roof Growers in Chicago is still doing such a good job of growing fresh vegetables in EarthBox sub-irrigated planters (SIPs). The only difference is that he is now growing on concrete.
It matters not when you are growing in SIPs. All you need is enough sun and water. You never need to worry about the hard work of turning over the soil and whether it is contaminated with lead or arsenic. SIPs are hygienic and can be organic from day one.
The quality of the plants in these photos tells you instantly that Russ knows what he is doing.