Will these do well in a container and in snowy weather should they be cut back to the soil for winter?
Birds, especially finches, love coneflower seed so it is best to leave the stems intact. Cut them down late winter, early spring. I'm concerned about it surviving the winter above ground. And the container soil will be spent so they will need repotting or the addition of compost next spring. Soil-less mixes, like most potting soils lose their ability to retain water as the peat degrades.