I ran out of nursery pots starting cannas last year. Luckily my mom had a large hoard of plastic coffee cans in her garage. With permission and a drill they worked great. When weather was questionable I'd move them in to the garage, earlier starts make for taller plants faster. After transplanting I topped them off with garden soil and tossed in excess leaf lettuce seed and rotated them to the back porch as needed. The molded handholds are a nice feature.
