A person by the name of Steve Turner, owner of Wangara Horticultural Supplies has invented these film grade poly very strong planter bags with handles, it seems primarily for tree farmers. yet they seem like a great idea for urban framing in backyards or condo balconies. Growing in some small yards in west Toronto yardsis daunting when attempting to plot out some space to grow, and have enough space to use the yard for child play, eating and entertaining.
These bags would allow the movement of plantings of veg and herbs around as needed.
These bags are from Australia and I do not think they are available in Canada, but they do not look difficult to cut and sew up.