I grow my daylilies in pots. I prefer large clay pots personally, but they are heavy and difficult to move. I do have some large ceramic and plastic containers as well. The ceramics are usually even more difficult to move around than the clay pots because they have no place to grip and are very slick. They need to come with handles
. I'm not very consistent about the potting mix. Using potting soil of any brand is too expensive for large pots. I tend to pad it with pine bark. The finer the better, but it's hard to come by so I use larger often. I also use anything else I have on hand - like oak leaves that been put in a compost container and haven't quite turned to compost yet. Anything to add volume and reduce the amount of potting soil. That has also included fresh wood chips the power line people left in exchange for place to park their equipment. Surprisingly, using that ground up wood didn't lead to as much yellow foliage as I was expecting. On some plants it seemed to have no effect at all and a lot of those that did turn yellow seemed to outgrow it as the temperatures rose during the summer. Keeping a potted container with sufficient moisture requires regular attention and plants in a container have their roots more exposed to high and low temperatures than when they are in the ground.