I grow all my veges and herbs in flower box and flower pot,

because i can have a control on soil and not pulluted by chemicals in runoff water. 

https://www.homedepot.com/p/CITY-PICKERS-24-5-in-x-20-5-in-Patio-Raised-Garden-Bed-Grow-Box-Kit-with-Watering-System-and-Casters-in-Evergreen-2341-1HD/206936544