Commercial growing bags are constructed of heavy, dense polypropylene. Put a few inches of a soil-compost mixture in the bottom of a bag, then plant 3 or 4 seed potato pieces and cover with 3 inches of soil. Continue adding soil as the plants grow until the bag is filled. To harvest, turn the bag on its side and dump out the contents.
Pros: Grow Bags can be placed on patios or driveways or used where garden soil is of inferior quality. The bags should last for several growing seasons. Their dark color captured solar heat to speed early growth. Harvest was simple, and the yield was impressive, considering the small space each bag occupies.
Cons: This is a pricey technique.