You probably need to get them somewhere permanently soon as one ft high in a 4" pot is beginning to push them a bit...
As Aunt Sally says, can they go in the GH now, if you're using a border which is going free?
Wouldn't worry about the flowers, as you can bury the roots quite deep to get them to sprout more little side roots underground! You often see them in GCs with flower buds on them, quite low down!
Good luck!