When can I put them out?

As a canna newbie, I'm not sure how early the tubers can go out. I've potted all of mine and was thinking that since it's warm during the day, they might do well if I go ahead and put them out. But would the nighttime temps in the 40's negate all that good soil warming that happpened during the day? How early can I put my cannas outside for good?

Hello Mick,

You might wish to start them indoors until all danger
of frost has passed, then plant them outdoors.

Here is a good reference for your last frost date:

http://www.thegardenhelper.com/hardiness.htm

:-)

Thanks, WUVIE. I'll keep them in the basement with good light.