They want a lot of sun to keep their shape and color, and a cooler winter period. I supose it depends upon your table

. The shallow tray is good, let them get quite dry between waterings. Sun will be your challenge, but since you can move them if your table doesn't get direct sun, put them in the sun for a few weeks and use cut
flowers for your table. When the
flowers die, put them back, then move them into the sun again in a week ot two. I grow mine outdoors in full sun. They don't mind the -10F, I don't know what they actually need for winter. Good luck!