Canna or Cannas plants should have full sun but can live with a little less. Mine have always grown at least 6-7 feet. They multiply excessively & bloom in the Fall. (at least here in MN, they do!)
Canna lilies need full sun. So do cannabis plants... I've never heard of Cannis.Sago palm needing repotting?
Are you speaking of cannabis or amarilla?
Because I cannot find anything called cannis on the internet..the one picture I could find looks like an amarilla.
If you tell me which one you are speaking of I can maybe help you out.where to get information on a science project