Almost any type of container can be used for gardening, as long as it is sturdy enough to provide adequate space and drainage channels. In addition to traditional flower pots, planters and other professional containers, many of life's artifacts can be utilized with modifications, such as plastic pots, carrying buckets, flower boxes, planters, wooden boxes, aluminum skin boxes, galvanized iron boxes,, plastic boxes, altars, food cans, and even bath tubs, tires, sacks, and barbecue trays can be utilized. But no matter what container you choose, make sure there are drainage holes at the bottom.