How long does it take a canna to sprout in pots in greenhouse...I'm waiting patiently, but nothin's happenin'!
They like it hot. So if temps are steadily around 50 or higher, day and night, they should start sprouting, but they really grow when it gets a bit hotter. They like it hot.
Did you check the rhizomes to make sure they haven't turned to mush?
Guess what? One is sprouting! The rhizomes were all in great shape (although very ugly! hee,hee). I bought from Horn Canna Farm and even got a bunch of extras.
So why do you pot them up? Can't you just wait until it's warm enough outside and plant them directly in the ground. Are you potting them to get a head start? Do they bloom sooner if you start them in pots inside?