Having quite some success this summer with our 'Vegepod'. We have edible flowers, beans, chili, lettuces, many herbs++
This 'pod' garden system proved itself during Cyclone Gabrielle, which unleashed insane wind speeds upon us.
Well worth the investment, but surely something similar could be built from scrap metal, plywood and a suitable cover material. Whether it would be near as provably robust is another thing.


